R13-064 11
1 RESOLUTION NO. R13 - 064
2'
3 ! A RESOLUTION OF THE CITY COMMISSION OF THE
4 , CITY OF BOYNTON BEACH, FLORIDA, ADOPTING
5 THE CITY OF BOYNTON BEACH FLOOD
6 1 MITIGATION PLAN; AND PROVIDING AN
7 EFFECTIVE DATE.
8
9
10
11 WHEREAS, The Disaster Mitigation Action of 2000 (DMA 2000) authorized the
12 creation of a pre- disaster mitigation program that makes mitigation grants available to local
13 governments, providing they have a FEMA approved hazard mitigation plan in effect prior to
14 the time of disaster;
15 WHEREAS, Palm Beach County has developed the Palm Beach County Unified
16 Local Mitigation Strategy (LMS), which was adopted by the City of Boynton Beach in 2004;
17 WHEREAS, the development of a Flood Mitigation Plan is a recommended action of
18 the City of Boynton Beach's Local Mitigation Strategy;
19 WHEREAS, this City is committed to the mitigation of potential hazards, including
20 flood related hazards, and the protection of the public health, and the reduction of property
21 damage and loss of life that can result from flood events;
22 � WHEREAS, the development of a Flood Mitigation Plan can also prove effective in
23 improving the City's Community Rating System classification, resulting in enhanced flood
24 insurance premium reductions for residents and businesses in the community;
25 WHEREAS, the City of Boynton Beach entered into a cost - reimbursement agreement
26 with the State of Florida, Division of Emergency Management under the Flood Mitigation
27 Assistance Grant Program in an amount not to exceed $30,022.50 with all work to be
28 complete by September 30, 2013;
1
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l
1 WHEREAS o n December 12, 2011, the City of Boynton Beach retained CRS Max 1
11
� � � Y Y
2 1 Consultants, Inc. to perform CONSULTANT services;
3 WHEREAS, The City of Boynton Beach, working with its staff, key community
4 stakeholders and its CONSULTANT, prepared a Flood Mitigation Plan outlining mitigation
5 strategies;
6 WHEREAS, the City of Boynton Beach has afforded the citizens an opportunity to
7 comment and provide input in the Plan and the actions in the Plan; and
8 NOW, THEREFORE, BE IT RESOLVED BY THE CITY COMMISSION OF
9 THE CITY OF BOYNTON BEACH, FLORIDA, THAT:
10 Section 1. The foregoing "Whereas" clauses are hereby ratified and confirmed as
11 being true and correct and are hereby made a specific part of this Resolution upon adoption
12 hereof.
13 Section 2. The City Commission of the City of Boynton Beach, Florida does
I
14 I hereby adopt the Flood Mitigation Plan, a copy of which is attached hereto as Exhibit "A."
15 Section 3. That this Resolution shall take effect immediately upon passage.
16
17
2
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1 PASSED AND ADOPTED this 16 day of July 2013
2
3 CITY OF BOYNTON BEACH, FLORIDA
4
5
6
7 Mayor — erry Taylor
8
9
10 il% .„,.
11 ; ice Mayor — Woodrs L. Hay
12
13
14 Il k
15 Commis ioner — David T. Me -r
16
17 „ ( \ _.,
18
19 Commissioner — Michael M. F p. ick
20 ^ /
21
22
23 C missioner — Joe Casello
24 ATTEST:
25
26
27 ,
28 ' ' s • , - P
29 1 Jan; M. Prainito, MMC,
30 Clerk
31
32 G VT Y � `'
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I �
CITY OF BOYNTON BEACH FLORIDA
li
Community ID #120196
it
Flood Mitigation Plan
Mayor Jerry Taylor
Vice Mayor Woodrow L. Hay
Commissioner David Merker
Commissioner Michael Fitzpatrick
Commissioner Joe Casello
July 2013
II �
Prepared by
CRS Max Consultants, Inc.
II Coconut Creek, Florida
City of Boynton Beach, Florida
Flood Mitigation Plan
Table of Contents
Section 1 - Purpose and Introduction
Section 2 - Compliance with Flood Mitigation
Programs and Plans
Section 3 - Organize to Prepare the Plan
Section 4 - Coordination with Other
Organizations and Plans
Section 5 - Assess the Flood Hazard
Section 6 - Assess the Flood Problem
Section 7 - Goals
Section 8 - Review of Possible Activities
Section 9 - Action Plan
Section 10 - Implement, Evaluate and Revise
Section 11 - Adoption of the Plan
APPENDICES
Appendix A - Questionnaire
Appendix B - Plans, Studies, Reports
Appendix C - Storm Tide Maps
Appendix D - Canal Inventory
Appendix E - Flood Problem Areas
Appendix F - Flood Maps
Appendix G - SLOSH, Storm Surge Maps
Appendix H - Emergency Operation Areas Map Coverage
Appendix I - Evacuation Zones, Tsunami Hazard Map
Appendix ] - Critical Facilities
Appendix K - History of Flood Insurance Claims
Appendix L - Repetitive Loss Areas
Appendix M - Zoning Map, Future Land Use Map
Appendix N - Capital Improvement Program Projects
Appendix 0 - Project Submission to LMS Procedure
Appendix P - Program for Public Information (PPI)
Exhibits
Exhibit One - Meeting Documentation
Exhibit Two - Contact with Agencies and Organizations
Exhibit Three - Explain Planning Process to the Public
Exhibit Four - Other Public Information Activities
Exhibit Five - Solicitation of Input on the Action Plan
Exhibit Six - Possible Activities Not Recommended
Exhibit Seven - Resolution to Adopt
C►tv ul Buv'nton Beach f=lood \1►t►gat►un flan
Purpose and Introduction - Section One
Purpose of the Flood Mitigation Plan
Of all natural hazards, the one that consistently has the greatest impact on
local communities is flooding. And of all the states in the nation, none is
impacted more by flooding than Florida. For this reason alone, it makes a
great deal of sense for members of a community to join together to study the
hazard of flooding and to develop a plan to reduce (or mitigate) its impact.
This is precisely what the City of Boynton Beach has done.
Mitigation is the effort to reduce loss of life and property by lessening the
impact of disasters. Flood mitigation is taking action now — before the next
flood event —to reduce human and financial consequences later (analyzing
risk, reducing risk, insuring against risk). Flood mitigation planning can lead
to activities that lessen the impacts of disasters and reduce the loss of life
and property for residents, governments and businesses in a community.
Accordingly, the purpose of the City of Boynton Beach Flood Mitigation Plan
(FMP) is to produce a program of activities that will best address the
community's vulnerability to the flood hazard and to:
• help to reduce flood losses
➢ improve local flood hazard mitigation capability
y Increase public and private sector awareness by education about the
flood hazard, about loss reduction measures, about flood insurance,
and about the natural and beneficial functions of floodplains
address and protect cultural, economic and natural resources
• provide a basis for justifying the solicitation and use of local, state,
federal and other funds to support hazard mitigation projects and
initiatives
This Flood Mitigation Plan may also serve as an economic development
initiative. The fact that the City of Boynton Beach and its residents are
involved in this type of mitigation
planning is a selling point to
potential residents, businesspeople
and developers when they are , -
considering coming into the
community. ,
:fir.► n >.
The City of Boynton Beach w-
The city bears the name of its `"y
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('itv ul Boynton Beach flood ;Alrii ttion Plan
founder, Major Nathan S. Boynton, a distinguished Civil War veteran, who
came to South Florida from Port Huron, Michigan in 1895. He bought 500
acres and began construction of the Boynton Hotel in 1895 with workmen
recruited from Michigan. They brought their families and settled in the new
town.
The City of Boynton Beach is located in southern Palm Beach County, Florida.
With a 2011 population of 68,409, it is the third most populous city in a
county of 38 municipalities. The area of Palm Beach County is 2,054 square
miles, of which Boynton Beach comprises 16.25 square miles. The land area
of the City of Boynton Beach is 15.88 square miles and the water area is
0.37 square miles.
The city is situated across the Intracoastal Waterway to the east by the City
of Briny Breezes and Ocean Ridge and shares a border with areas of
unincorporated Palm Beach County, the City of Hypoluxo to the north and the
City of Delray Beach to the south. It is located approximately 45 miles north
of Miami and 15 miles south of West Palm Beach. This puts it in the heart of
southeast Florida's tri- county Miami - Dade /Broward /Palm Beach metropolitan
areas.
The city has direct access to the Intracoastal Waterway and the Atlantic
Ocean via the Boynton Beach Inlet and both Interstate 95 and the Florida
Turnpike. It also has a market of over 6.5 million people within a 100 -mile
radius of the city and ready access to three international airports, three
major seaports, two major rail lines, as well as the Tri -Rail commuter rail
system.
The industries with the highest share of the employment in the city are retail
services and health services. Total employment in sectors usually less
affected by recessions - health services, education services and public
administration - constitutes approximately 32% of the total employment in
the city.
The Commission - Manager form of government governs Boynton Beach.
Voters elect a mayor and four commissioners, who in turn appoint a City
Manager to manage the day -to -day operation of the City and to carry out
Commission policy.
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( itN, of Boynton Beach Hood y1ihtLahon Plan
Compliance with Flood Mitigation Programs and Plans
Section Two
This Flood Mitigation Plan has been purposefully developed to be consistent
with the National Flood Insurance Program's Community Rating System
Floodplain Management Planning Process, the Flood Mitigation Assistance
Planning Grant requirements and the Disaster Mitigation Act of 2000.
National Flood Insurance Program
In 1968, Congress created the National Flood Insurance Program (NFIP) to
help provide a means for property owners to financially protect themselves,
to minimize response and recovery costs and to reduce the loss of life and
damage to property caused by flooding. The NFIP, a federal program, offers
flood insurance to homeowners, renters, and business owners if their
community participates in the NFIP. In order to qualify for flood insurance, a
community must join the NFIP and agree to enforce sound floodplain
management standards. Floodplain management regulations that meet
minimum NFIP standards have been adopted by over 20,000 communities
nationwide. Participating communities agree to adopt and enforce
ordinances that meet or exceed FEMA requirements designed to protect new
and existing buildings from anticipated flooding, and to prevent new
developments from increasing the flood threat to existing properties.
The NFIP is administered by the Federal Emergency Management Agency
(FEMA), which works closely with nearly 90 private property and casualty
insurance companies to offer flood insurance to property owners and renters.
Rates are set and do not differ from company to company or agent to agent.
These rates depend on many factors, which include the date and type of
construction of a building, along with the building's level of risk.
The primary benefits of the NFIP are to:
✓ Provide flood insurance coverage not generally available in the
private market;
✓ Stimulate local floodplain management to guide future
development;
✓ Emphasize less costly nonstructural flood control regulatory
measures over structural measures; and
✓ Reduce costs to the federal and state governments by shifting
the burden from the general taxpayer to floodplain occupants.
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( Etv of Boynton Beach Hood Nhti2,auon Plan
The City of Boynton Beach has been a participant in the National Flood
Insurance Program (NFIP) since January 1979 and will continue to be
compliant with the program by continuing to:
✓ require permits for all new development in the SFHA;
✓ elevate the lowest floor of all residential buildings in the SFHA to or
above the Base Flood Elevation (BFE);
✓ restrict development in the regulatory floodway;
✓ ensure that construction materials and methods used will minimize
future flood damage; and
✓ treat substantially improved structures as new buildings that must
meet the minimum NFIP standards.
The success of the NFIP depends on communities' ensuring that buildings
and other development within their jurisdictions are constructed and
maintained according to these standards so that flood losses will be
minimized. If communities do not elect to participate in the program or if
they do so but fail to adequately enforce the standards, then lives and
property are placed in harm's way; buildings will suffer unnecessary flood
damage; the NFIP's actuarial soundness will be jeopardized; and the costs to
society from future floods will be increased unnecessarily.
The Building Official is the Floodplain Administrator for the City of Boynton
Beach.
The Community Rating System Program
This document has been prepared to qualify as a " floodplain management
plan" under the Community Rating System (CRS). The National Flood
Insurance Program's (NFIP) CRS was implemented in 1990 as a program for
recognizing and encouraging community floodplain management activities
that exceed the minimum NFIP standards. When communities go beyond the
NFIP's minimum standards for floodplain management, the CRS can provide
discounts of up to 45% off flood insurance premiums for residents of those
communities. Communities apply for a CRS classification and are given
credit points that reflect the impact of their activities on the three goals of
the CRS:
1. Reduce flood losses,
2. Facilitate accurate insurance ratings, and
3. Promote the awareness of flood insurance
To obtain the necessary credit points to achieve lower CRS class ratings,
communities implement a broad range of programs aimed at addressing the
three goals of the CRS program. There are eighteen activities by which
communities can accumulate points toward their class ratings. These
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its of Boynton Beach 1 food I\1itu&ation flan
activities, designated in the FEMA Community Rating System Coordinator's
Manual are:
Maximum
Activity Points
Number Available
310 Elevation Certificates 162
320 Map Information Service 140
330 Outreach Projects 380
340 Hazard Disclosure 81
350 Flood Protection Information 102
360 Flood Protection Assistance 71
410 Additional Flood Data 1,346
420 Open Space Preservation 900
430 Higher Regulatory Standards 2,740
440 Flood Data Maintenance 239
450 Stormwater Management 670
510 Floodplain Management Planning 359
520 Acquisition and Relocation 3,200
530 Flood Protection 2,800
540 Drainage System Maintenance 330
610 Flood Warning Program 255
620 Levee Safety 900
630 Dam Safety 175
The activities above, credited by the CRS provide direct benefits to the
community, including:
• Enhanced public safety
• Reduction in flood damage
• Environmental protection
• Residents are reminded that the community is working to protect
them from flood losses
• Public information activities will build a knowledgeable constituency
Interested in supporting improving flood protection measures
• Money stays in the community instead of being spent on insurance
premiums.
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( its of 13ovnton Beach Flood Irliti<,ation Plan
Participating jurisdictions are classified in CRS classes. These classes range
from Class 1, which requires the most credit points and provides the largest
reduction in insurance premiums, to Class 10, which receives no reduction in
insurance premiums. A community applies for the program using the CRS
Application. The Insurance Services
Office's (ISO) CRS Specialist reviews
the community's program and CRS Flood Insurance
verifies the CRS credit. Credit Points Class Premium
Discount
In October 1991, Boynton Beach 4500 + 1 45%
qualified for the CRS Program. As of 4000 — 4499 2 40%
October 1, 2012, the City of Boynton
Beach has attained a CRS rating of 3500 — 3999 3 35
Class 7, resulting in a 15% reduction 3000 — 3499 4 30 %
in flood insurance premiums for 2500 2999 5 25%
residents that purchase flood
insurance in Special Flood Hazard 2000 — 2499 6 20%
Areas (SFHA), and a 5% premium 1500 -1999 7 15%
reduction in non -SFHAs in the city.
1000 — 1499 8 10%
In conjunction with the development 500 — 999 9 5%
of this Flood Mitigation / Floodplain
Management Plan, Boynton Beach 0 — 499 10 0
will continue to implement other
CRS activities that go beyond the minimum NFIP requirements. It is a goal
of the Building Division of the Development Department in 2013 to improve
the City's CRS rating. As a CRS program participant, the City actively
pursues a broad range of flood mitigation and management activities,
including:
• Many educational outreach projects through an Outreach Program
Strategy
o Including outreach projects that make community
members aware of the availability and value of flood
insurance
• Mapping information, including furnishing inquirers with flood zone
information and using digitized maps which are available on the
City's website
• Regulations and ordinances such as enforcing regulations for
stormwater management, prohibiting dumping in the drainage
system, soil and erosion control and water quality
• Flood protection information displayed on the Boynton Beach
website and in the City's library
• Preserving over 240 acres in the SFHA as open space in the City
The City of Boynton Beach will accumulate additional CRS credit by
developing this Flood Mitigation / Floodplain Management Plan. While the
CRS program does not dictate exactly what details are to be in a Flood
CRS Ma> Consultants Inc ,buy 2013
Section Two Rige
( it of Boynton Beach E-lood v1itte,ati Plan
Mitigation / Floodplain Management Plan, it will credit this Plan with
additional points consistent with the standard 10 -step planning process
outlined in the FEMA CRS Coordinator's Manual:
1. Organize to prepare the plan (10 points maximum)
2. Involve the public (85 points max)
3. Coordinate with other agencies (25 points max)
4. Assess the hazard (20 points max)
5. Assess the problem (35 points max)
6. Set goals (2 points max)
7. Review possible activities (30 points max)
8. Draft an Action Plan (70 points max)
9. Adopt the Plan (2 points)
10.Implement, evaluate and revise (15 points max)
The City of Boynton Beach Flood Mitigation Plan has been prepared in
accordance with the 10 -step planning process.
The Disaster Mitigation Act of 2000
Among its main features, the Disaster Mitigation Act of 2000 (DMA 2000)
authorized the creation of a pre- disaster mitigation program that makes
mitigation grants available to states, as well as to local and tribal
governments, providing they have a FEMA approved hazard mitigation plan
in effect prior to the time of the disaster. In accordance with the DMA 2000,
Palm Beach County has developed the Palm Beach County Unified Local
Mitigation Strategy, which covers all of the hazards that affect the county.
The City of Boynton Beach adopted the LMS as its hazard mitigation plan in
2004. This hazard mitigation plan has enabled the county and the
municipalities within the county that adopted it to receive Hazard Mitigation
Grant Program (HMGP) awards and a Flood Mitigation Assistance (FMA)
Planning Grant, which was used to develop this Flood Mitigation Plan. The
planning regulations for the DMA are consistent with the CRS process.
Flood Mitigation Assistance Program Grants
The Federal Emergency Management Agency's (FEMA's) Flood Mitigation
Assistance Program (FMA) provides funding to states and communities for
measures that reduce or eliminate the long -term risk of flood damage to
buildings, manufactured homes, and other structures insurable under the
National Flood Insurance Program (NFIP). The Program provides grants for
mitigation planning, projects and technical assistance, with a goal of reducing
flood insurance claims under the NFIP.
There are certain guidelines that must be followed to take advantage of the
grants that are available from FEMA. In this Flood Mitigation Plan, the City of
Boynton Beach has identified projects in the Action Plan section so that when
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( Itv of Bo" nton Beach Flood Iy1i1auon Plan
funding is available, the City can apply for grants. FMA Project Grants are
available to NFIP - participating communities to implement measures to
reduce flood losses. The City of Boynton Beach has been an NFIP-
participating community since 1979, and will continue to comply with NFIP
requirements. Communities receiving FMA project funds must have FEMA-
approved Flood Mitigation Plans (or multi- hazard plans which address flood
hazards) in place prior to receiving FMA Project Grant funds. This flood
mitigation plan is specifically intended to assist the City of Boynton Beach to
comply with this requirement. The plan enables the City to quickly respond
to state and federal funding opportunities for flood mitigation - related
projects. The plan defines, justifies, and prioritizes flood mitigation initiatives
that have been formulated through a flood hazard analysis and vulnerability
assessment process. When applying for grants, the City will be better
prepared, using this plan, to quickly and more easily compile the necessary
grant application materials for seeking state and federal funding.
Palm Beach County Unified Local Mitigation Strategy 2009
The City of Boynton Beach actively participates in the development and
updating process of the Palm Beach County Unified Local Mitigation Strategy
(LMS), which was formally adopted by the county, participating
municipalities, and the LMS Steering Committee in 1999. The LMS was
established and continues to operate in accordance with prevailing federal,
state and local guidelines and requirements. In 2004 the plan and program
were substantially modified to improve operational effectiveness and to
comply with new federal guidelines established in response to the Disaster
Mitigation Act of 2000.
The LMS is a unified strategy for reducing the community's vulnerability to all
of the identified natural, technological, and societal hazards that may affect
the County. Although the City has found great value in the flood mitigation
sections of the LMS, in 2010 the City determined there was a need for
strengthening this component of the strategy specific to Boynton Beach and
incorporating increased public input as part of the plan development process.
Many of the items in the Action Plan in Section Nine of this Flood Mitigation
Plan will be submitted for inclusion as mitigation items for scoring and
prioritization in the LMS.
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C itv of Boynton Beach 1 load Mnte,aton Plan
Organize to Prepare the Plan - Section Three
"Organize to Prepare the Plan" is the first step in FEMA's 10 -step planning process
that the City of Boynton Beach utilized to prepare this plan. The City's Building
Official was in charge of the City of Boynton Beach Flood Mitigation Plan project and
through a bidding process retained CRS Max Consultants, Inc., of Coconut Creek,
Florida, using FEMA Flood Mitigation Assistance Planning Grant funding, to provide
oversight of the planning process and to write the plan.
A "Kickoff Meeting" was held in December, 2011 with the consultant, the Building
Official, who was in charge of the project, and the Community Rating System (CRS)
Coordinator, who was instrumental in applying for the FMA Planning Grant to
discuss the:
• Description of goals
• Description of the process
• First steps of the process
• Set up an organizational meeting with staff
A second meeting, held on January 17, 2012 was a "Staff Organizational" meeting,
which brought the Flood Mitigation Plan to the attention of Staff from the
departments that would be crucial to the development and implementation of the
FMP. For the purposes of doing more with less, reducing redundancy, and creating
stronger plans and programs, it is recommended that the different departments
responsible for these types of plans work together. Building bonds and bridging
communication gaps will help accomplish the tasks mentioned in this document and
will ultimately benefit all citizens affected by flooding. The attendees included:
➢ Nancy Byrne - Director of Development
• Debbie Majors - Grant Coordinator
• Chris Roschek, P.E. - Utilities Engineer and Stormwater Management; NPDES
Coordinator, Engineering Division Manager
• Samantha Powers - GIS Division
y Carisse LeJeune - Assistant City Manager, Palm Beach County LMS Steering
Committee and Hazard Analysis Chairperson
Tim Large, CBO, Deputy Building Official
• Louis Johnson, Stormwater Supervisor
• Kathleen Lee, Building Department Fee Coordinator, CRS Coordinator,
Certified Floodplain Manager (CFM), FMA Grant writer
➢ Andrew Mack, P.E., CBO, LEED AP, Interim Building Official
• Don Johnson, Building Department, Senior Structural Plan Reviewer, and
Previous Building Official; with background knowledge of flooding history
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➢ Eric Johnson, Planning and Zoning Division, Planner II, FMP Task Force
Chairperson, CFM
➢ Earl King, CRS Max Consultants, Inc., CFM
• Joan Van Stone, CRS Max Consultants, Inc., CFM
Flood Mitigation Task Force
The Flood Mitigation Task Force Chairperson focused on the resources needed for a
successful mitigation planning process, including identifying and organizing
interested members of the community as well as the technical expertise required
during the planning process. Potential Flood Mitigation Task Force members were
recruited by placing advertisements on the City's website, Twitter and Facebook.
Two responses were received. Staff recommendations were then solicited and
contacted. The following Flood Mitigation Task Force was assembled comprised of
City Staff from those departments that will be implementing the plan's
recommendations, local stakeholders and residents:
Flood Mitigation Task Force - City of Boynton Beach Staff
Eric Johnson, Task Force Chairperson, Department of Development, Planning &
Zoning Division, Planner II, AICP, CFM, LEED Green Associate, CRS
Coordinator
Kathleen Lee, CFM, Former Building Department Fee Coordinator, FMA Grant
Writer, Former CRS Coordinator
Louis Johnson, Stormwater Supervisor, Department of Utilities
Rick Lee, Fire and Life Safety Administration, Fire Marshall
Carisse LeJeune, Assistant City Manager, Palm Beach County LMS Steering
Committee and Hazard Analysis Chairperson
Kevin Hallahan, City Environmentalist, Urban Forester
Flood Mitigation Task Force - City of Boynton Beach Stakeholders
and Residents
Larry Taylor, City of Boynton Beach resident
Wayne Groves, Maintenance Supervisor, Brookdale Senior Living, several facilities
in the area, worked with Palm Beach County Emergency Management
periodically and other counties around the state. Represents critical facilities.
Jim Collamore, CFM, Palm Beach County resident, recently retired from Pima
County, Arizona Regional Flood Control District in Tucson, Arizona for 25
years, of which last 15 years was Senior Hydrologist in the Floodplain
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City of Boynton Beach f load Mitnnition Plan
Management Section and Senior Engineering Assistant in the Planning &
Development Division
James Brake, Coldwell Banker, Chamber of Commerce, Planning & Development
Board member, Brand Promise Committee, City of Boynton Beach resident in
the SFHA
Jessica Glenn, City of Boynton Beach resident in the SFHA, Environmental college
student and Intern Environmentalist
Michael Bottcher, CPCU; Senior Vice President and Producer, Plastridge
Insurance Group; Immediate Past Chair, Boynton Beach Chamber of
Commerce
Bradley Miller, AICP, Principal, Miller Land Planning, Inc., Boynton Beach Chamber
of Commerce, Boynton Beach Community Alliance, Palm Beach County
Planning Congress
David Lumbert, Former Manager of Iberia Bank, Business Development Board of
Palm Beach County, Former Chamber of Commerce, Vice President of Corporate
Development, Flagler Bank
Joe Pike, P.E.; President, EnviroDesign Associates, Inc.; LEED Accredited
Professional
Several other City of Boynton Beach Staff members attended meetings at the
invitation of the Chairperson, for their expertise on particular meeting subjects.
There were Staff members who were not available to attend all meetings but
requested to be included on the mailing list and offered their help and expertise:
Chris Roschek, P.E., Utilities Engineer and Stormwater Management; NPDES
Coordinator, Engineering Division Manager
Michael Low, Deputy Director Utilities Division
Kofi Boateng, Director Utilities Division
Octavia Sherrod, Community Development Manager, manages City's federal and
state grants regarding housing
Stephanie Slater, Public Information Officer, Boynton Beach Police Department
The Task Force provided invaluable input concerning problem identifications, goals
and objectives, and mitigation actions and strategies for the plan. Members of the
task force were able to supplement the flood data that was obtained for this report
CRS Max Consultants Inc Joiy 2013
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C rt■ of Bo ntun Beach 1 lood \1itueat1on Plan
with their personal knowledge and experiences concerning the flood hazard in the
city.
The Task Force was fortunate to have guest speakers that presented information at
three meetings of the Task Force. On April 11 and April 25, Sheridan (Butch)
Truesdale, Senior Planner, Emergency Management Division, and CRS Coordinator
for Palm Beach County, and Jesse Spearo, Special Projects Coordinator, Palm Beach
County Division of Emergency Management, spoke about all of the hazards that
affect Palm Beach County. Ronald Crone, District Manager and Patrick Martin,
Director of Engineering, Lake Worth Drainage District spoke about stormwater
management in Boynton Beach at the Flood Mitigation Task Force meeting on June
27, 2012.
Flood Mitigation Task Force Meetincis
The Task Force identified the characteristics and potential consequences of the
flood hazard in Boynton Beach. Armed with an understanding of the risks posed by
flooding, the Task Force determined what the priorities should be and considered
potential activities to avoid or minimize the hazard. The result is a flood mitigation
plan, including a strategy for implementation.
In order to be effective, the Flood Mitigation Plan must be implemented through an
Action Plan that includes a variety of activities, ranging from implementing specific
mitigation projects to advocating code requirements for developers. To ensure the
success of the ongoing program, it is critical that the plan remains relevant. Thus, it
is important to conduct periodic evaluations and make revisions as needed.
These key steps were broken into sections that were individually presented and
discussed at the Task Force meetings. The breakdown of specific steps undertaken
at each Task Force meeting is as follows:
Task Force
Meeting Planning Step(s) Topics Covered
Date
03 -21 -2012 4. Assess the Hazard • Goals of the Task Force
• Description of 10 -Step planning process
• Begin assessment of the flood hazard
04 -11 -2012 4. Assess the Hazard • Continue assessment of the flood hazard
• Guest Speakers Butch Truesdale and
Jesse Spearo
04 -25 -2012 5. Assess the Problem • Assessment of the Problem
• Guest speakers Butch Truesdale and
Jesse Spearo
• Multi- hazard assessment
• Local and regional perspective of
vulnerability to hazards
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Task Force
Meeting Planning Step(s) Topics Covered
Date
04 -25 -2012 Community Outreach Meeting • Held in venue located in SFHA
immediately following Task Force
Meeting
• Receive input from community on flood
problems, suggestions, etc.
05 -09 -2012 6. Set Goals • Review of Steps 1 -5
• Discuss examples of goals
• Discuss goals of other City plans
• Formulate set of goals
05 -30 -2012 6. Set Goals • Recap of previous meeting
• Continue to develop goals and
objectives
06 -13 -2012 7. Review of Possible Activities • Review of first three meetings:
Informational, educational, preparatory
• Review of last two meetings: Began
development of the Plan by deciding on
the Goals
• Begin to look at practical ways to meet
the Goals
06 -27 -2012 7. Review of Possible Activities • Guest speakers from Lake Worth
Drainage District
• Continue review of mitigation activities
07 -18 -2012 7. Review of Possible Activities • Continue review of possible activities
08 -08 -2012 7. Review of Possible Activities • Continue review of possible activities
7 Review of Possible Activities • Continue review of possible activities
08-29-2012 8. Act Plan • Begin compilation of Action Plan
09 -12 -2012 8. Action Plan
• Prioritize, assign responsibility and
funding of action items
09 -26 -2012 8. Action Plan
• Approval of Action Plan by Task Force
09 -26 -2012 Community Outreach Meeting • Held in venue located in the SFHA
immediately following the Task Force
Meeting
• Input on the Action Plan
Please see Exhibit 1 for a copy of the advertisements, agendas, sign in sheets and
minutes from the Flood Mitigation Task Force meetings.
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Involve the Public in the Planning Process
The flood mitigation planning process is most effective when the citizens and
stakeholders within the community are actively engaged. An extensive community
involvement process was initiated throughout the development of this plan with
opportunities provided to the citizens of Boynton Beach to participate in the
planning process. This direct representation and participation allowed the Task
Force to gain insight into current and past neighborhood- specific flood issues and
possible mitigation actions.
Having Boynton Beach citizens on the planning committee has the following
advantages:
❑ The participants recognize that they are involved and will be more willing to
commit themselves to the process.
❑ The participants may do some of the work, especially data gathering, thereby
reducing the overall cost.
❑ A committee can be an effective forum for discussing alternatives, debating
goals and objectives, and matching the technical requirements of a program
to local situations.
❑ It gives the participants a feeling of "ownership" of the plan and its
recommendations, which helps build public support for it.
❑ Committee members form a constituency that will have a stake in ensuring
that the plan is implemented.
The public was invited to every Task Force meeting, by invitations on the City's
website, Facebook and Twitter.
Over half of the Flood Mitigation Task Force members were from the public,
including residents, representatives from the banking, insurance, real estate, land
development and engineering industries, an environmentalist, a critical facilities
engineer and a retired floodplain manager. The members of the public on the City
of Boynton Beach Flood Mitigation Task Force included:
Larry Taylor, Resident, City of Boynton Beach
Wayne Groves, Engineering Supervisor, Brookdale Senior Living with several
facilities in the area, worked with Palm Beach County Emergency
Management periodically and other counties around the state. Represents
critical facilities
Jim Collamore, CFM; Palm Beach County resident, recently retired from Pima
County, Arizona Regional Flood Control District in Tucson, Arizona for 25
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years, of which last 15 years was senior hydrologist in the floodplain
management section and senior engineering assistant in the Planning &
Development division, CFM
James Brake, Coldwell Banker, Chamber of Commerce, Planning & Development
Board member, Grand Promise Committee, City of Boynton Beach resident in
the SFHA
Jessica Glenn, City of Boynton Beach resident in the SFHA, Environmental college
student and intern Environmentalist
Michael Bottcher, CPCU; Senior Vice President and Producer, Plasteridge
Insurance Group; Immediate Past Chair, Boynton Beach Chamber of
Commerce
Bradley Miller, AICP; Principal, Miller Land Planning, Inc.; Boynton Beach
Chamber of Commerce; Boynton Beach Community Alliance; Palm Beach
County Planning Congress
David Lumbert, Manager, Iberia Bank; Business Development Board of Palm
Beach County; Chamber of Commerce; Flagler Bank
Joe Pike, P.E.; President, EnviroDesign Associates, Inc.; LEED Accredited
Professional
Community Outreach Meetings
The Flood Mitigation Task Force held a community outreach meeting to obtain
public input on the flood hazard, flood problems,
and possible solutions to those problems. The
community meeting was held early in the It •
process, in the SFHA of the city. Opportunities '
were provided at this meeting for the general
public to speak with representatives from the
City and with members of the Flood Mitigation
Task Force regarding their flooding problems,
emergency response, questions, and concerns.
The meeting was held on April 25, 2012 at the
Intracoastal Park Clubhouse, located on the
Intracoastal Waterway at the Boynton Beach
Inlet to the Atlantic Ocean. Fourteen members of the public attended this meeting.
A second community meeting was held on September 26, 2012 to solicit input on
the draft Action Plan. A copy of the Action Plan was sent to all members of the
public that have shown an interest in flood mitigation planning and was placed on
the City's website. The community meetings were advertised on the City's website,
Facebook page, Twitter, and in the local newspaper, The Boynton Beach Forum.
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Copies of these advertisements, the agenda, minutes, and the sign in sheet are
included in Exhibit 1.
Questionnaire Distributed to the Public
A questionnaire was developed and distributed to the public seeking input,
comments, recommendations, and information on their natural hazards, flood
problems and possible solutions. The questionnaire was available via multiple links
on the County's website. It was distributed at all public flood mitigation information
meetings. The questionnaire seeks the public's input regarding any past flooding
problems that personally affected them or their surrounding neighborhoods,
requesting information regarding:
❑ Location of home or business
❑ Flood history of the property (frequency and severity)
❑ Flood history of the street /neighborhood (frequency and severity)
❑ Concerns about natural hazards other than flooding
❑ Preparedness
❑ Use of flood insurance
❑ Respondent's suggestions on how to eliminate or reduce flood problems,
including personal actions taken to protect themselves and their property
from flooding
See Appendix A, which includes a copy of the questionnaire.
Solicitation of Comments and Recommendations
In an effort to communicate and coordinate with the public and local stakeholders,
letters were sent to a number of stakeholders in the affected areas seeking their
input, comments and recommendations, and asking for their support of the City's
flood mitigation efforts. These included the following:
❑ Neighborhood advisory groups ❑ Academia
❑ Homeowners' associations ❑ State NFIP Coordinator
❑ Parent - teacher organizations ❑ State water resources agency
❑ Chamber of Commerce ❑ FEMA regional office
❑ Neighboring communities ❑ National Weather Service
❑ Agencies involved in hazard mitigation ❑ Red Cross
activities
❑ Agencies that regulate development ❑ Homebuilders' Associations
❑ Businesses ❑ Environmental Groups
See Exhibit 2, which includes is a list of stakeholders that represent the public in
the affected areas from which comments and recommendations were solicited, and
a copy of the letter that they received. In addition to the opportunity to respond to
the letter, several local stakeholders also participated in the planning process and
provided input to the Task Force.
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Explain the Planning Process to the Public
The Flood Mitigation Plan planning process was explained to the City of Boynton
Beach staff at the first staff organizational meeting January 17, 2012, and a
handout showing the planning steps was distributed to all attendees. This process
was also described and the steps completed were reviewed at each Flood Mitigation
Task Force meeting, as well as the public meetings on April 25 and September 26,
2012. The planning process was described on the City's website, specifically
outlining the ten steps of the Flood Mitigation / Floodplain Management Plan. See
Exhibit 3, which includes documentation that shows how the planning process was
explained and distributed to the public.
Other Information Activities to Encourage Public Input
In an effort to communicate and coordinate with the public and stakeholders, an
effort was made to encourage input to the Flood Mitigation Task Force by
advertisements in local newspapers, the County's website, by mail, and utilizing
other means. The public was invited to every Flood Mitigation Task Force Meeting
via the City's website, Facebook and Twitter.
An article was placed in the newsletter of a large homeowners' association
describing the flood mitigation planning process. Several residents of this
community attended the public outreach community meetings as a result. Please
see Exhibit 4 for evidence of this important element of the planning process.
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Coordination with Other Organizations and Plans
Section Four
Coordination among numerous governmental agencies and organizations is
beneficial for effective plan development, particularly as it relates to issues
involving life and property. Palm Beach County, neighboring municipalities,
the South Florida Water Management District, the Lake Worth Drainage
District, the School Board, regional, state and federal agencies, authorities
and taxing districts are among the long list of key players who make direct or
indirect decisions that impact residents, visitors, the economy and quality of
life in the city. The City of Boynton Beach Flood Mitigation Plan (FMP) Task
Force prioritized coordination with these agencies.
Hazard mitigation planning is most successful when it results in actions that
also support other important community goals and objectives, so it is
important that the development of a flood mitigation plan includes involving
and coordinating with government agencies and private organizations for two
reasons:
1. Other agencies may be implementing, or planning to implement
activities that can affect flood damage, the hazards, or other local
interests and concerns. The Task Force needs to ensure to the
greatest extent possible that its efforts and plans will not conflict with
other essential government programs. Equally important, especially in
this time of budget cuts, is to avoid duplication of efforts and
resources.
2. Involvement of outside agencies and organizations may secure valued
assistance. This assistance may be in the form of hazard data,
technical information on various measures, guidance on regulatory
requirements, advice in the planning effort, implementation of a
recommended measure, and /or financial participation to help
implement a recommended measure.
In January 2012, a letter was sent to 132 recipients, who included
neighboring communities, local, regional, state, and federal agencies,
businesses, academia and other private and non - profit organizations that
may be affected by the flood hazard or involved in flood mitigation or
floodplain management to request input on the City's flood mitigation
planning efforts. A copy of the letter and a list of recipients are included in
Exhibit 2.
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Review of Existinci Studies, Reports, and Plans for the Area
The Flood Mitigation Task Force has access to a wide variety of information.
Members, local government offices, and many other sources allow for the
group to bring information together for planning purposes. This information
has been compiled to address mitigation issues and establish mitigation
initiatives for incorporation into this FMP.
The City's community development goals and floodplain management /
mitigation goals may be mutually supportive or they may conflict, but they
must be acknowledged. Therefor -7 e, the development of this FMP has
included a concerted effort to assure it is in conformance with the City's
other plans, studies and reports, many of which were used for reference or
informational purposes.
This FMP conforms with and applies the principles and guidance offered by
the City of Boynton Beach Comprehensive Plan to ensure that it considers, is
consistent with, and is supportive of the Comprehensive Plan and also the
related plans of neighboring municipalities and other governmental entities
as well as regional, state and federal plans and requirements. It is the intent
of the Flood Mitigation Plan Task Force that the FMP be consistent with and
support the City's Comprehensive, Emergency Management, Post - Disaster
Redevelopment Plans and other studies, reports and technical information.
The FMP Task Force utilizes the City of Boynton Beach Comprehensive Plan,
Intergovernmental Coordination Element for guidance on how
intergovernmental coordination will be conducted and managed in the City of
Boynton Beach. The following goals, objectives, and policies of this element
are particularly relevant to the planning process of the FMP:
• Goal 8: It is the goal of the City of Boynton Beach, through
increased coordination, interaction and communication with adjacent
local government and other pertinent coordinating entities, to maintain
constant awareness of the plans and intentions of such entities, and
address, alleviate or anticipate all major issues which involve a single
agency or numerous entities.
• Objective 8.8: The City will continue to coordinate with the
Lake Worth Drainage District, the South Florida Water
Management District, Palm Beach County, and any other
agencies as may be appropriate, on stormwater planning and
management issues.
• Policy 8.8.1 The City shall coordinate with the Florida
Department of Environmental Protection, the South
Florida Water Management District, Palm Beach County
Department of Environmental Resources Management and
other affected parties in meeting the requirements of the
Florida Total Maximum Daily Load Program for the Lake
Worth Lagoon.
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• Objective 8.10 The City shall continue cooperative efforts to
protect aquifer recharge areas.
• Objective 8.13 The City shall maintain avenues of coordination
with those agencies, departments and entities that assist in the
development and maintenance of a high quality natural
environment based on the preservation, improvement and wise
management of local existing natural resources.
• Objective 8.16 The City shall continue to enforce all applicable
local, state and federal coastal environmental regulations while
providing for the development of remaining vacant waterfront
residential properties.
• Policy 8.16.3 The City shall continue to coordinate with the
Coastal Council and other agencies to identify County, State
and Federal grants available for establishing a local dune
protection program,
Plans, flood studies, reports and technical information from state agencies
and neighboring counties and municipalities were reviewed in the planning
process. Most of these documents can be found in their entirety on the
Internet. Following is a listing of the documents that have been examined
during the development of this plan to collect helpful information and to
assure conformance with their goals and objectives. This listing should prove
helpful to the Flood Mitigation Task Force in future planning efforts, especially
for annual evaluations and five -year updates of this FMP. A list of the
website addresses of the following documents is included as Appendix B:
• City of Boynton Beach Comprehensive Plan 2008
• Flood Insurance Study Wave Height Analysis, City of Boynton
Beach, Florida, March 31, 1982
• The Development Atlas of The City of Boynton Beach 2009
• Heart of Boynton Redevelopment Plan
• Ocean District Community Redevelopment Plan
• South Lake Worth (Boynton) Inlet Fact Finding Study
• Lake Worth Lagoon Management Plan Revision, March 1998
• South Lake Worth Inlet Surge Modeling Review
• City of Boynton Beach Hurricane Guide 2012
• City of Boynton Beach Green Building Program
• The City of Boynton Beach Community Development Block
Grant Program
• Engineering Design Handbook and Construction Standards
for the City of Boynton Beach, Department of Public Works
Engineering Division
• City of Boynton Beach Canal and Waterway Reclamation and
Maintenance
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• Palm Beach County Unified Local Mitigation Strategy 2009
• Countywide Post Disaster Redevelopment Plan Palm Beach
County, Florida August 2006
• Palm Beach County Comprehensive Emergency Management
Plan
• Palm Beach County Department of Public Safety Division of
Emergency Management Recovery Plan 2011
• Palm Beach County Hurricane Survival Guide
• Flood Insurance Study, Palm Beach County, Florida, August
1978
• Flood Insurance Study Wave Height Analysis, Palm Beach
County, Florida, April 15, 1982
• State of Florida Division of Emergency Management
Hurricane Ono Consequences, Version 7
• Integrating Hazard Mitigation into Comprehensive Planning,
Palm Beach County Profile
• Division of Emergency Management State of Florida
Enhanced Hazard Mitigation Plan
• Treasure Coast Transportation Analysis Hurricane Evacuation
Study Update
• Florida Statewide Regional Evacuation Study Program
• Sea Level Rise in the Treasure Coast Region, Treasure Coast
Regional Planning Council, December 2005
• Profile of General Demographic Characteristics - Treasure
Coast Regional Planning Council website
• A Region Responds to a Changing Climate, Regional Climate
Action Plan, October 2012
Meeting with Other Agencies and Organizations
As a result of the Flood Mitigation Plan Task Force's efforts to include
stakeholders and pertinent agencies and organizations in the planning
process, many helpful responses were received. Task Force representatives
spoke and /or met with the following respondents to discuss common
problems, mitigation strategies, programs, etc.:
Sheridan "Butch" Truesdale, Palm Beach County Emergency
Management Division, Senior Planner, is known as one of the region's
foremost mitigation and recovery experts. Mr. Truesdale was awarded
the Lifetime Achievement Award at the 2012 Florida Governor's
Hurricane Conference for his years of service in emergency
management. He is the County's CRS Coordinator and developed the
County's post- disaster redevelopment plan for catastrophic disasters
through the PDRP, and has developed and implemented highly
acclaimed programs and initiatives that have become standards for
communities around the country. Mr. Truesdale is also involved in
building a private public partnership trying to engage the private
sector in a way that will add to the capacity of the County in
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Emergency Management. He is working together with Dade, Broward
and Monroe Counties to put together a regional partnership. This
group has gotten a state statute through to get emergency generators
at gas stations on the evacuation routes, and passed legislation which
will protect private sector families who take in first - responders and
their families who are victimized by a storm. Mr. Truesdale and Jesse
Spearo, Division of Emergency Management, Special Projects
Coordinator and LMS Coordinator attended two FMP Task Force
meetings and presented valuable hazard identification, hazard
vulnerability analysis and historical flooding information.
)> Ron Crone, District Manager and Patrick Martin, Director of
Engineering, Lake Worth Drainage District attended a Task Force
meeting and presented pertinent information regarding the LWDD in
Boynton Beach and stormwater management.
➢ David Kennedy, Assistant Administrator for Ocean Services and
Coastal Zone Management, United States Department of Commerce,
National Oceanic and Atmospheric Administration (NOAA) contacted
the Task Force. While Mr. Kennedy did not envision direct
participation in the planning process, he did offer NOAA resources,
such as the Digital Coast, which is a suite of integrated geospatial
data, tools, training and partnerships that are developed and used by
the coastal community. Tools in the suite include the Roadmap for
Adapting to Coastal Risk, The Sea Level Rise Inundation and Impacts
Viewer, and Coastal Community Snapshots, which is a county -based
series of important information.
➢ C. Douglas Bass, Director, Emergency Management and Safety,
South Florida Water Management District stated that there are no
flood mitigation activities specific to the City of Boynton Beach at this
time and offered to assist in whatever way possible.
➢ Gerry O'Reilly, Director of Transportation Development, District Four,
Florida Department of Transportation (FDOT) told of the Department's
five -year work program, which shows only a section of I -95 re-
surfacing project in Boynton Beach. He knows of no flooding issues on
State roads within the City's limits. Mr. O'Reilly asked that the FDOT
be given an opportunity to review the City of Boynton Beach Flood
Mitigation Plan and that this will allow for input and coordination
should FDOT projects develop in the future.
➢ Angela Usher, Facilities Planning and Coordination, Planning and Real
Estate Services, Palm Beach County School District, replied to the Task
Force's solicitation on March 12, 2012. She discussed past flooding at
Galaxy Elementary School in Boynton Beach, which was nuisance
flooding as no buildings were damaged. The School Districts has
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prepared an Interlocal Agreement with the City of Boynton Beach
which addresses surface water management.
Solicitation of Input on the Draft Action Plan
A draft of the City of Boynton Beach Flood Mitigation Plan Action Plan was
sent to most of the agencies, organization and stakeholders that were
contacted at the beginning of the planning process, as well as to any
members of the public that have shown an interest in flood mitigation
planning, asking them to comment by a certain date. The Action Plan was
also posted on the City's website, along with an invitation to the community
outreach meeting on September 26 See Exhibit 5 for a copy of the
correspondence and a list of all those that received a copy of the draft action
plan.
The following responses were received by the Task Force:
• Butch Truesdale, Palm Beach County Emergency Management
Division, Senior Planner suggested that some of the action items
should be submitted to the LMS for scoring and prioritization for grant
funding. He is hoping that mitigation funds will be coming available
through a variety of grant funding sources and HMGP monies the
County may get from Hurricane Debbie (third Tier) and Isaac in 2012,
if the County should get a Presidential Declaration.
➢ Bonnie Finneran, Director, Palm Beach County Department of
Environmental Resources Management, explained that her department
has no permit authority over jurisdictional wetland areas, as an action
item had stated. The Task Force corrected the action item in the Plan.
• Timothy R. Small, SVP Engineering and Technical Programs, Federal
Alliance for Safe Homes, Inc. (FLASH), did not have any additional
information to offer but invited the Task Force to contact FLASH in the
future with any questions or requests.
• Edward Hale, Program Analyst - Risk Analysis Branch, Mitigation
Division - FEMA Region IV, also reminded the FMP Task Force that
some of the items in the Action Plan should be submitted to the Palm
Beach County LMS.
• The Home Depot Foundation was contacted because a resident that
attended one of the community meetings complained about the
flooded parking lot at Home Depot. Although the City is not
responsible for private property, the Task Force Chair suggested that
the City reach out to Home Depot and offer suggestions to alleviate
the flooding in problem parking lots. The Foundation suggested that
the Task Force contact the store directly and complimented the Task
Force on the work it was doing and the City's dedication to
preparation.
➢ Ron Miedema, U.S. Environmental Protection Agency, West Palm
Beach field office, suggested that the Task Force contact the U.S.
Army Corps of Engineers to determine if a federal permit is required
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for any of the action item projects that propose impact to freshwater
or tidal wetlands. Mr. Miedema was encouraged that the plan included
action items that protect the natural areas of the floodplain.
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Assess the Flood Hazard - Section Five
Flood or flooding refers to the general or temporary conditions of partial or
complete inundation of normally dry land areas from the overflow of inland or
tidal water and of surface water runoff from any source. Floodplains are
defined as any land areas susceptible to being inundated by water from any
flooding source.
Flooding can be divided into two major categories: Coastal and
Inland /Riverine. While there are no rivers in the City of Boynton Beach and
little flooding has occurred in the past, Boynton Beach's low -lying topography
combined with its subtropical climate makes it highly vulnerable to inland
flooding. Those areas lying east of Federal Highway are particularly
vulnerable to coastal flooding from storm surges, and people living in those
areas should be prepared if a major storm threatens.
In the City of Boynton Beach intense or prolonged, concentrated rain is the
primary cause of localized flooding. Major rainfall events occur in association
with hurricanes, tropical storms, and thunderstorms associated with frontal
systems. This overabundance of rainfall creates saturated soil conditions,
after which additional rain causes surface ponding or an overflow of
catchment canals and ponds. This can result in street and yard flooding,
which is regarded as nuisance flooding. There is rarely any damage done to
buildings, as most buildings are required to be elevated above the base flood
elevation.
Flooding in the City of Boynton Beach can occur as a result of one, or a
combination of two or more of the following events:
)- Tropical Cyclone
➢ Storm Surge
➢ Thunderstorms
➢ Dam /Dike Failure
➢ Sea Level Rise
• Tsunami
➢ Rogue Wave
Risk, or the probability of loss, depends on three elements:
• Frequency - How frequently does a known hazard produce an impact
within the community?
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• Vulnerability - How vulnerable is a community to the impacts
produced by a known hazard?
• Exposure - What is the community's exposure in terms of life and
property to the impacts produced by a specific hazard?
As stated in the Relative Probability of Hazards table in the Palm Beach
County Unified Local Mitigation Strategy 2009 (LMS), the following describes
the relative vulnerability of the City to flooding:
y the frequency of flooding in the City of Boynton Beach is considered to
be high
• the vulnerability of the City to the impacts of flooding is considered to
be high
• The exposure of the City to the effects of flooding is high
• the risk is high
These are relative terms that were not defined any further in the LMS.
Tropical Cyclones
In general terms, a hurricane is a cyclone. A cyclone is any closed circulation
developing around a low pressure center in which the wind rotates
counterclockwise in the Northern Hemisphere (or clockwise in the Southern
Hemisphere) and whose diameter averages 10 to 30 miles across. A tropical
cyclone refers to any such circulation that develops over tropical waters.
They act as a safety -valve that limits the build -up of heat and energy in
tropical regions by maintaining the atmospheric heat and moisture balance
between the tropics and the pole ward latitudes.
As a developing center moves over warm water, pressure drops (measured
in millibars or inches) in the center of the storm. As the pressure drops, the
system becomes better organized and the winds begin to rotate around the
low pressure, pulling the warm and moist ocean air. It is this cycle that
causes the wind (and rain) associated with a tropical cyclone. If all of the
conditions are right (warm ocean water and favorable high altitude winds),
the system could build to a point where it has winds in excess of 155 miles
per hour and could become catastrophic if it makes landfall in populated
areas.
Tropical cyclones with a maximum sustained wind speed of less than 39 mph
are called tropical depressions. When the maximum sustained wind speed
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ranges between 40 -73 mph they are tropical storms. When the maximum
sustained wind speed exceeds 74 mph they are called hurricanes.
Hurricanes vary greatly in size, intensity, behavior, and movement. All
hurricanes are dangerous, but some are more so than others. The way
storm surge, wind and other factors combine determine the hurricane's
destructive power. Hurricanes are destructive because they produce damage
due to high winds, large amounts of rainfall and storm surge. Storm surge is
simply water that is pushed toward the shore by the force of the winds
swirling around the storm. This advancing surge can combine with the
normal tides to create the storm tide. An intense hurricane can send a dome
of water more than 18 feet deep ashore as the storm hits land. Coastal
flooding can be difficult to predict. Flooding may be worse from a direct hit
by a lesser category hurricane, in comparison to a glancing hit by a larger
category storm. In the City of Boynton Beach, storm surge flooding that will
occur during a hurricane or major storm will be along the Intracoastal
Waterway and the finger canals off the Intracoastal Waterway, west to
Federal Highway and possibly to the railroad tracks. A further discussion of
the storm surge hazard in the City follows in the "Storm Surge and Storm
Tide" section of this Flood Mitigation Plan.
In the City of Boynton Beach damage during hurricanes may also result from
inland flooding and heavy rainfall that usually accompanies these storms.
This overabundance of rainfall creates saturated soil conditions that cause
surface ponding or an overflow of catchment canals and ponds. In many
areas of Boynton Beach the lack of proper drainage exacerbates the problem
To make comparisons easier and to make the predicted hazards of
approaching hurricanes clearer, the National Oceanic and Atmospheric
Administration's hurricane forecasters use a disaster - potential scale that
assigns storms to five categories. This can be used to give an estimate of
the potential property damage and flooding expected along the coast with a
hurricane.
The scale was formulated in 1969 by Herbert Saffir, a structural consulting
engineer, and Dr. Bob Simpson, director of the National Hurricane Center.
The World Meteorological Organization was preparing a report on structural
damage to dwellings due to windstorms, and Dr. Simpson added information
about storm surge heights that accompany hurricanes in each category.
The Saffir- Simpson Hurricane Scale is a 1 -5 rating based on the hurricane's
present intensity. This is used to give an estimate of the potential property
damage and flooding expected along the coast from a hurricane landfall.
Wind speed is the determining factor in the scale, as storm surge values are
highly dependent on the slope of the continental shelf and the shape of the
coastline in the landfall region. A narrow shelf, or one that drops steeply
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( Itv ut` Boynton Beach I loud Ni ti ation flan
from the shoreline and subsequently produces deep water in close proximity
to the shoreline, tends to produce a lower surge but higher and more
powerful storm waves. This is the situation along most of the Atlantic Ocean
side of the state of Florida.
SAFFIR - SIMPSON HURRICANE DAMAGE POTENTIAL SCALE
Category Central Pressure Winds Surge Damage
inches millibars (mph) (ft.)
1 >28.94 >980 74 -95 4 -5 Minimal
2 28.50 -28.91 965 -979 96 -110 6 -8 Moderate
3 27.91 -28.47 945 -964 111 -130 9 -12 Extensive
4 27.17 -27.88 920 -944 131 -155 13 -18 Extreme
5 <27.17 <920 >155 >18 Catastrophic
Category 1 Winds 74 -95 mph. Storm surge generally 4 to 5 feet above
normal. No real damage to building structures. Damage
primarily to unanchored mobile homes, shrubbery, and trees.
Some damage to poorly constructed signs. Also some coastal
road flooding and minor pier damage.
Category 2 Winds 96 -110 mph. Storm surge generally 6 -8 feet above
normal. Some roofing material, door and window damage of
buildings. Considerable damage to shrubbery and trees blown
down. Considerable damage to mobile homes, poorly
constructed signs, and piers. Coastal and low -lying escape
routes flood 2 -4 hours before arrival of the hurricane center.
Small crafts in unprotected anchorages break moorings.
Category 3 Winds 111 -130 mph. Storm surge generally 9 to 12 feet
above normal. Some structural damage to small residences and
utility buildings with a minor amount of curtain wall failures.
Damage to shrubbery and trees with foliage blown off trees and
large trees blown down. Mobile homes and poorly constructed
signs are destroyed. Low -lying escape routes are cut by rising
water 3 -5 hours before arrival of the center of the hurricane.
Flooding near the coast destroys smaller structures with larger
structures damaged by battering from floating debris. Terrain
lower than 5 feet above mean sea level may be flooded inland 8
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miles or more. Evacuation of low -lying residences within
several blocks of the shoreline may be required.
Category 4 Winds 131 -155 mph. Storm surge generally 13 -18 feet above
normal. More extensive curtain wall failures with some
complete roof structure failure on small residences. Shrubs,
trees, and all signs are blown down. Complete destruction of
mobile homes. Extensive damage to doors and windows. Low -
lying escape routes may be cut by rising water 3 to 5 hours
before arrival of the center of the hurricane. Major damage to
lower floors of structures near the shore. Terrain lower than 10
feet above sea level may be flooded requiring massive
evacuation of residential areas as far inland as 6 miles.
Category 5 Winds greater than 155 mph. Storm surge generally greater
than 18 feet above normal. Complete roof failure on many
residences and industrial buildings. Some complete building
failures with small utility buildings blown over or away. All
shrubs, trees, and signs blown down. Complete destruction of
mobile homes. Severe and extensive window and door damage.
Low -lying escape routes are cut by rising water 3 to 5 hours
before arrival of the center of the hurricane. Major damage to
lower floors of all structures located less than 15 feet above sea
level and within 500 yards of the shoreline. Massive evacuation
of residential areas on low ground within 5 -10 miles of the
shoreline may be required. Only three Category Five Hurricanes
have made landfall in the United States since records began.
Because hurricane preparedness activities become difficult once winds reach
tropical storm force, the hurricane watch is issued by the National Weather
Service 48 hours in advance of the anticipated onset of tropical- storm -force
winds. A hurricane warning is issued when hurricane conditions (sustained
winds of 74 mph or higher) are expected somewhere within the specified
area.
In the event that a major hurricane threatens Palm Beach County, many low -
lying coastal areas would be inundated to varying depths by the storm surge
and exceptionally high tides which accompany the storm. Tides 3 -4' above
normal could occur 24 -36 hours before the eye of the hurricane reaches the
coastline. Many of the causeways, as well as mainland coastal roads, could
be inundated well in advance of the storm's arrival, thus restricting or
denying their use as evacuation routes.
Some areas in the City of Boynton Beach that would possibly be subject to
flooding by storm tides are:
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('itv oI Boynton Beach 11ood Mitibalion Plan
• Zone A /Category 1 - east of the U.S. 1 (Federal Highway)
• Zone B /Category 3 - east of the FEC railroad tracks.
Flood watches (when conditions are right for flooding) and flood warnings
(flooding is imminent) will be issued by local television and radio stations.
Residents in flood prone areas of Boynton Beach will also be warned of an
actual emergency condition by the sounding of a steady siren tone provided
by fire and law enforcement mobile units. When these signals are sounded,
residents should turn to their local television and radio stations for
information.
Taken from the Relative Probability of Hazards table in the Palm Beach
County Unified Local Mitigation Strategy 2009 (LMS), the following table
shows the relative vulnerability to the City to the different categories of
hurricanes and /or tropical storms. These are relative terms that were not
described any further in the LMS:
Category Category Category Category Category
1 2 3 4 5
Frequency High High Moderate Low Very Low
Vulnerability High High High High High
Exposure High High High High High
Risk High High High Moderate Low
Since 1886, 51 storms of hurricane intensity have passed within 125 miles of
Palm Beach County. This represents an average of one hurricane every two
years. The number of direct hits on the southeastern Florida coastline
between 1899 and 1999 has been as follows:
Category 1 Storms: (winds 74 to 95 mph) = 4 storms (4 % annual
probability);
➢ Category 2 Storms: (winds 96 to 110 mph) = 10 storms (10% annual
probability);
➢ Category 3 Storms: ( winds 111 to 130 mph) = 7 storms ( 7% annual
probability);
• Category 4 Storms: (winds 131 to 155 mph) = 6 storms (6% annual
probability);
➢ Category 5 Storms: (> 155 mph) = 1 storm (1% annual probability)
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From 1995 -2012, only four major hurricanes out of 66 (6 %) that formed in
the Atlantic basin have made landfall along the Florida Peninsula /East Coast.
The 20th century average is that approximately 18% of all major hurricanes
that form in the Atlantic basin make Florida Peninsula /East Coast landfall.
There has been a three times reduction in the number of major hurricanes
making Florida Peninsula /East Coast landfall during the most recent active
period when compared with the 20th century average.
More impressive signals can be seen if the 2004 -2005 hurricane seasons are
excluded, when three major hurricanes made landfall along the Florida
Peninsula and East Coast. From 1941 -1969 and 2004 -2005, 24 major
hurricanes made landfall along the Florida Peninsula /East Coast over 31
years, or 0.77 major hurricane landfalls per year. This compares with the
1970 -2012 (excluding 2004 -2005) average when an average of only 0.13
major hurricane landfalls per year occurred (or approximately six times fewer
landfalls per year during the more recent period).
FLORIDA — — j` ;
PENINSULA
AND EAST 1
COAST ONLY
1941 -1969 and % FL +Ec
2004 -2005 (31 Lan is
:�K` Atlantic c B Basin
yrs) Total
Major 24197 = 25%
Hurricanes 0 77 Landfalls
(24 Landfalls) per year
Florida Peninsula and East Coast major hurricane landfalls from 1941 -1969 and 2004 -2005
FLORIDA
PENINSULA .�
AND EAST
COAST ONLY
1970 - 2012 (not % us Landfall to
mcluding 2004 Atlantic Basin
2005) (41 yrs) Total
Major 5/91=6%
HUfrlCarleS 0 12 Landfalls
per year
(5 Landfalls)
Florida Peninsula and East Coast major hurricane landfalls from 1970 -2012 (excluding 2004 - 2005).
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From Philip J. Klotzbach and William M. Gray at Colorado State University in
the Qualitative Discussion of Atlantic Basin Seasonal Hurricane Activity for
2013 they state that one of the big uncertainties for the 2013 Atlantic basin
hurricane season is whether or not El Nino will develop. Their first
quantitative forecast for 2013 will be issued on Wednesday, April 10, 2013.
The table below shows the climatological probabilities for the 2013 hurricane
season for different Tropical Cyclone categories for the East Coast of the
United States:
Region Tropical Category 1 -2 Category 3 -4 -5 All Named
Storm Hurricane Hurricane Hurricanes Storms
Florida plus
East Coast 50% 44% 31% 61% 81%
(Regions 5-
11)
In year 2012 Colorado State University also issued the following tropical
cyclone landfall probabilities. Southeast Florida is considered Region 6:
50 Year Regional Data
50 Year Probability 50 Year Probability of 50 Year Probability of
Region of 1 or More Named 1 or More Hurricanes 1 or More Intense
Number Storms Making Making Landfall I the Hurricanes Making
Landfall in the Region Landfall in the Region
Region
6 >99.9% >99.9% >99.9%
50 Year County Data
County Name Palm Beach
50 Year Probability of 1 or More Named 95.6%
Storms Making Landfall in the County
50 Year Probability of 1 or More Hurricanes
89.1%
Making Landfall in the County
50 Year Probability of 1 or More Intense 63.2%
Hurricanes Making Landfall I the County
50 Year Probability of Tropical Storm Force
>99 .9%
( >_ 40 mph) Wind Gusts in the County
50 Year Probability of Hurricane Force ( >_ 75
99.9%
mph) Wind Gusts in the County
50 Year Probability of Intense Hurricane 90.0%
Fore ( >_ 115 mph) Wind Gusts in the County
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Dr. Randall Dole at the NOAA Climate Prediction Center states that when it
comes to forecasting climate in the months, years and decades ahead, there
are many challenges in accurately predicting what the future holds. When
and ENSO event - wither the warm pulse of El Nino or cool pulse of La Nina
is identified, certain general predictions based on probability can be made at
a regional level. ENSO - neutral is favored in the Northern Hemisphere in the
fall of 2013 (these statements are updated once a month by the Climate
Prediction Center).
Early -Feb CPC /IRI Consensus Probablitstic ENSO Forecast 1
too - --
90 ENSO state basea on NINO3 4 SST Anomaly
Neutral ENSO -0 45 to 0 45 �
80 N. El Nino
C.:11 Nsatral
70 f MN La Nina
-
so d i
50 Climatobg,cal
1 PiobabiMy
40 I — El Nino
30 � ff „ NF
20 W Nina
� I
0
JFM FMA MAM AMJ MJJ JJA JAS ASO SON
2013 Tim* P*riod 2013 — —
The state, county and local emergency management personnel look to El
Nino /La Nina studies and advisories to help predict the future storm seasons.
An explanation of the El Nino /La Nina phenomena and the latest predictions
of the El Nino /La Nina patterns are as follows:
El Nino is a term originally used to describe the appearance of warm
(surface) water from time to time in the eastern equatorial Pacific region
along the coasts of Peru and Ecuador.
La Nina is defined as cooler than normal sea - surface temperatures in the
central and eastern tropical Pacific Ocean that impact global weather
patterns. La Nina conditions recur every few years and can persist for as
long as two years.
Florida El Nino Effects:
❑ Rainfall - above average rainfall
❑ Severe Weather - During El Nino the jet stream is oriented from west
to east over the northern Gulf of Mexico and Northern Florida. Thus
this region is most susceptible to severe weather.
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❑ Temperatures - below normal temperatures
❑ Winter Storms - increased cyclogenesis (low pressure, tropical cyclone
formation systems) in the Gulf of Mexico
❑ Hurricanes - El Nino almost always reduces the frequency of storms.
Florida La Nina Effects:
❑ Rainfall - Generally dry conditions prevail during La Ninas in late fall,
winter and early spring.
❑ Hurricanes - According to research, the chances for the continental
U.S. and the Caribbean Islands to experience hurricane activity
increases substantially during La Nina.
Storm Surge and Storm Tide
The City of Boynton Beach's coastal areas are susceptible to storm surge
flooding: The
abnormal rise of water
levels generated by the f>
force of onshore winds 1'
produced by tropical.. 1
storms, hurricanes,
and northeasterners. — --- -
It is a large dome of
water often 50 to 100
miles wide and rising
anywhere from four to
five feet in a Category 1 hurricane up to 20 feet in a Category 5 storm. The
storm surge arrives ahead of the storm's actual landfall and the more intense
the storm is, the sooner the surge arrives. Water rise can be very rapid,
posing a serious threat to those who have waited to evacuate flood prone
areas. Then the water rushes back into the ocean (negative tide) as
tsunamis do, often with an even stronger force. A storm surge is a wave
that has outrun its generating source and become a long period swell. The
surge is always highest in the right -front quadrant of the direction the
hurricane is moving in. As the storm approaches shore the greatest storm
surge will be to the north of the hurricane eye.
Such a surge of high water topped by waves driven by hurricane force winds
can be devastating to coastal regions. The severity of flooding can vary
significantly based on a variety of factors such as storm intensity, forward
speed, angle of attack, the slope of the continental shelf and tidal conditions.
The northern and southern coastal areas of Palm Beach County are
somewhat more susceptible to surge flooding than are the central sections,
where Boynton Beach is located. Storm surge heights, wind speed, fetch
length, pressure and associated waves, are dependent upon the configuration
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of the continental shelf (narrow or wide)
and the depth of the ocean bottom
— 77.. -- . — � M (bathymetry). A narrow shelf, or one
a drops y .r :� from the shoreline and
,,u,2,. i that dro P steeply p Y
� �,. ,.�. �-. 4.
"° subsequently produces deep water in
close proximity to the shoreline, tends to
produce a lower surge but higher and
—,;•9 ._ ' ", more powerful storm waves. The
_ stronger the hurricane and the shallower
""° ""° the offshore water, the higher the surge
j , W� will be. Boynton Beach is in particularly
' good shape because of the deep water off
' shore. Only 1.8 miles offshore of
I Boynton Beach the water is 299' deep.
s , y e
When the water is that deep, it is less
likely to be forced up into storm surge. And 4.3 miles out is 590' deep, so
quite a narrow shelf with deep water saves Boynton Beach and much of the
County. The storm surge maps of the County still show that the storm surge
can be up to 15'.
A Palm Beach Basin, Sea, Lakes and _ a
Overland Surge from Hurricane r "` -. --- ,..
(SLOSH) Model was run by the U.S. ;� .. —
Army Corps of Engineers in 1994 4,,,_
and serves as the official SLOSH _
model and is used in determining ,
hurricane evacuation zones.
Currently the USACE is re- running '� '- '__t:...
the SLOSH Model based on new • , �- ,__
information and, once received by
P
1:
alm Beach County, this tidal - ""'
inundation information will assist in
the determination of new hurricane
evacuation zones. u= ,
ps
If the storm surge arrives at the same time as the high tide, and /or a full
moon, the water height will be even greater. The storm tide is the water level
rise during a storm due to the combination of storm surge and the normal
astronomical tide.
Storm Tide maps produced by a Statewide Regional Evacuation Study,
showing the threat to the City of Boynton Beach are included in Appendix C
of this Food Mitigation Plan.
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Table 4 Selected Points of Reference
MAP r . ,
ID NAME t, -UOn SUTAC. F SU1C SUk�L SURUF `+UR(,C 011H UF'H L. :h Df'lt ■PTH
A G HOLEY STATE HOSPITAL 10 7 O C CC, : 3 CO -: : C :: C: C,
2 AKER KASTEN SURGICAL EYE CENTER 122 35 .. CC CC , . 3C - 7 . .. :.
3 F .,;NT1S OUTPATIENT CENTER LIC 15: C r , - (, C C : - C "
BELE G:ADE C TY POUCE DEPT
4 HEADQUARTERS 1`` .- 5° :5 I :E .. :2 .
BELLE GLADE F RE DEPT _ . _ _ . .
BETHESDA MEMORIAL HOSPITAL J .. - • - ° C. - .. : .
- SOCA RATON COMMUNITY HIGH SCh00L 1 - 3 J , 3 - L - - C ' - - -
SOCA RATON CTY 10.00E DEPT ANNE% _ . _ _ - _ _ . - - I 5 - -
BOCA RATON CTf PC, SCE DEP" _ .
, HEA.DOUARTERS 13. _ ._ _ „` . --
4 0C RATON COMMJNFT 40$PI 1J: 5 L .: : _ , . .
BO;A RATON FIRE RESCUE S' 1 If... ' - - ' - - : • ` "J : " i
50CA RATON FIRE RESCUE S' 2 C : : • : C' i s 5 9
: 3O:.A RATON FIRE RESCUE ST: - 5- rE :4 J. C. .
BOLA ILA' ON FIRE RESCUE ST 5 ;'' _: :C - C -, r, : 3: 'c L
BOCA RA - ON OJTT'ATrENT SURGERY 4
.ASERCE h ^ C ' G 2 J5 1 C 7: : _ ,.
1 A3YNT ON BEACH ASC _LC 49 .'3 :5 1' :Cr 3 . ..
- S JYNTONBEA3H FIRE RESCUE ST 1 I1: .. r. 2, 35 :,., 5: .. ) :i
3DYNTCN BEACH H G4 SCHOOL I: = ., _ _ , t 5 : _ 3 : C ^
3.AlEAU OF ALCOHOL TOSACCC AND
15 ;REARMS FORT PERCE 1 1150 OFFICE _ _ _ _ .. i.'. . 2 - ° . E
.. CENTER FOR GASTROINTESTINAL `- :. - - . .. ._
CHILCRENS MEDICAL SERVICES CHLCRENS
r CA_ SERVICES _ r CC -- 1 ' `
SURGE refers to the storm s.,rge value f the SLOSH Model
)PT- refers co the depth of mundatior at the ste (stor surge value minus the ground elevation)
Thunderstorms
Thunderstorms are a frequent part of Florida life. They occur in all seasons
of the year in Florida, but they are more numerous during the warm season
when the wind off the sea flows inland during the afternoon. On an annual
basis, communities in Florida usually experience thunderstorms 75 to 105
days per year, with Boynton Beach receiving 70 -80 per year. In fact, Florida
leads the United States annually in the number of thunderstorm days. Out of
100,000 thunderstorms that occur within the United States each year,
approximately 1 out of every 10 storms can become severe, causing damage
or posing a threat to life.
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( itv of Boynton Beach 1 loud N1n1aUun Plan
Normal Precipitation
(WEST PALM BEACH INTL AP Weather station, 10.91 miles from Boynton Beach)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Inch 3.75 2 55 3.68 3 57 - 5 1 6116 .6.+ 6.56 3.14 61 39
The average annual rainfall in the City of Boynton Beach is 61.39 ", with
September usually being the wettest month. The annual average in the
United States is 37 ".
Three things need to be present in the atmosphere for a thunderstorm to
form. First, the atmosphere needs to be unstable. An unstable atmosphere
is essentially one in which warmer air near the ground will have a tendency
to rise higher in the sky, much like a hot air balloon. Second, there needs to
be a source of lift to get the air to rise. This lifting mechanism can be a cold
front, winds from another nearby
thunderstorm, or even a cooler
breeze off the nearby sea, known as a
sea breeze boundary. The sea breeze
thew
is the most common trigger for
thunderstorms during the summer
months in Florida. The lifting Gulf ,K . r. ..
mechanism acts much like a large
plow or shovel that forces the air
upwards. Once the lift gets the air to
move upwards, then the instability in
the atmosphere accelerates the air 1111/110111110,1M peg Mr
upwards. Third, there needs to be
or enough moisture in the atmosphere ...
to help make clouds as the air rises.
Without moisture, no clouds will form
even in the presence of lift and an unstable atmosphere.
Florida experiences more thunderstorms than other states because:
1. Florida is located close to large bodies of water that provide
moisture
2. Florida receives plenty of sunlight, which warms the air near the
ground and causes unstable air; and
3. Florida has frequent sea breezes that provide lift for the
thunderstorms. Without any of these three elements, Florida would
not have such numerous thunderstorms.
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Thunderstorms affect a relatively small area when compared to a hurricane.
The typical thunderstorm is 15 miles in diameter and lasts an average of 30
minutes. Despite their small size, all thunderstorms are dangerous.
Heavy rainfalls may not be associated with a tropical storm still are capable
of dropping significant rain in a short period of time. Severe storms occur
frequently in Florida during the summer.
Severe thunderstorm watches and warnings are issued by the National
Weather Service, as well as flood watches and warnings due to heavy rainfall
that may accompany the storms.
Taken from the Relative Probability of Hazards table in the Palm Beach
County Unified Local Mitigation Strategy 2009 (LMS), the following shows the
relative vulnerability to the City to the thunderstorms. These are relative
terms that were not described further in the LMS:
• the frequency of thunderstorm occurrence in the City of Boynton
Beach is considered to be high
• the vulnerability of the City is considered to be high
• the exposure of the City to the impacts of thunderstorms is medium
• the risk to the city is medium
Dam /Dike Failure
Dike failure is defined as an unintended, potentially catastrophic release or
surge of impounded water through or over a dike onto adjacent lands.
The failure of a dam or dike can result in a flood event. The most significant
risk related to dam /levee failure is flooding due to substantial rainfall.
Structural and non - structural techniques to slow and contain this runoff
incorporate several drainage systems, some dating back to 1919. Rainfall in
excess of designed capacities could cause erosion of constructed drainage
facilities and flooding of many areas including primary roadway evacuation
routes.
The Herbert Hoover Dike is one of many dams in Florida. Another that could
affect flooding in the City of Boynton Beach is Structure No. 41 Dam on the
C -16 (Boynton Canal) that is used for flood control purposes. Construction
was completed in 1965, and is operated by South Florida Water Management
District. Its length is 149 feet. Maximum discharge is 5300 cubic feet per
second. Its capacity is 50000 acre feet. Normal storage is 30000 acre feet.
The Herbert Hoover Dike is a 140 -mile long earthen structure that surrounds
and contains Lake Okeechobee (Seminole for "big water "). The large
freshwater lake, roughly circular in shape, covers approximately 730 square
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miles and borders Palm Beach, Martin, Okeechobee, Glades, and Hendry
counties. Lake Okeechobee is the second largest freshwater lake in the U.S.
In order to help meet the increasing demand for water in South Florida, the
decision was made in the 1970s to increase the upper limit of water levels in
the lake from 15.5' to 17.5' NGVD. With this increased lake level the dike
had to contain a permanent reserve of water, serving as much like a "dam"
as a levee. In fact, the dike embankment was officially registered with the
National Inventory of Dams in April of 2005. This requirement to serve as a
dam was well beyond the design expectations of the original dike. Under
continuous water pressure and storm related stresses, seepage (with the
related potential for internal erosion and piping), and overtopping began to
become ongoing serious concerns.
Today, the Herbert Hoover Dike consists of approximately 140 miles of
earthen embankment with a crest elevation ranging from 32' to 46' NGVD.
Adjacent land elevations typically range in elevation from 10 to 20 feet, with
the lower elevations
being found around Palm Beach County Herbert Hoover Dike Breach Inundation Area
the southern half of
the lake in the
vicinity of Palm I ' a
11�If
Beach County. Lake
elevations have =!t
varied historically
between about 12.5'
and 16.5' NGVD for " inn
80% of the dike's •� Ar
life. Most of the I,., it ►
annual precipitation
falls in the period .t
July to November, 1 /if
and the lake ist'
historically at its 11111
lowest levels in the
period June to — drierr %.<<
August. 1-411'.°
war be
. ad.ron bead en 2<' lake lend *id, nwlllpr boat... , S S 541-71 : -woo
Mi„n. wsrra
aa
h oroe Mw 11. Boa
There are tr2s.y„ \� DM Imam ; US Amy Corps
'2 940 of fashio
approximately 57
water control
structures along the project's perimeter, comprised of spillway outlets,
spillway inlets, primary and secondary culverts, locks, and pump stations.
The U. S. Army Corps of Engineers is responsible for lake management and
the operation, maintenance, repair, replacement, and rehabilitation of most
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C'ity of Btvnton Beach t lood Vhnuation Nan
of the water control structures. South Florida Water Management District
owns and operates a few of the structures.
Today, the lake provides drinking water for communities around the lake and
to the more than 6 million people living in Southeast Florida. It also serves
as a source of irrigation for a $1.5 billion -a -year agricultural industry that
processes sugar cane, winter vegetables, citrus and rice.
Rainfall from as far north as Orlando flows overland into streams that empty
into the lake. This is the Kissimmee basin. The total area that contributes
water flows to Lake Okeechobee is about 5600 square miles. Because the
Dike was built with very limited capacity to discharge excess water, large
rainfall events over the watershed can cause fairly rapid increases in water
level —up to several feet in height— within the lake, even if maximum
discharges are being made from the outlet structures. There is a one -to -six
ratio; meaning 1" of rain in the Kissimmee basin will cause 6" to be filtered
down to Lake Okeechobee. One -tenth of an inch (1/10 ") per day is the
maximum quantity of water released. From a hydrologic standpoint, its lack
of a spillway and comparatively small outlet capacity are largely what
differentiate Herbert Hoover Dike from more typical water - retaining
reservoirs. The resulting inability to control lake levels, and their potential to
rapidly rise, have magnified concerns over recognized seepage and stability
problems at high lake levels.
The Herbert Hoover Dike was completed in 1937 to protect Palm Beach
County citizens from experiencing another flooding event similar to the
occurrence in 1928. The flooding derived from the 1928 hurricane, which
resulted in over 2,500 deaths and thousands more injured in the western
portion of Palm Beach County. The dike protects from major flooding events
occurring in Belle Glade, Pahokee and South Bay municipalities, as well as
potential flooding in the Village of Wellington, Royal Palm Beach, West Palm
Beach, Palm Beach Gardens and unincorporated Palm Beach County. The
Herbert Hoover Dike is continuously monitored by the Army Corp of
Engineers (USACE).
A number of independent assessments by prominent engineering and science
organizations call into question the adequacy of the dike to withstand
extreme wind and rainfall conditions. There is consensus that a catastrophic
failure of the Herbert Hoover Dike would pose a significant danger to the
residents, local economies, and environment of Palm Beach County and
South Florida.
One need only reflect back to New Orleans and the secondary flooding
caused by Hurricane Katrina to fully appreciate how devastating dike failures
can be. Many people are not aware that the portions of the Herbert Hoover
Dike (HHD) and Lake Okeechobee residing in Palm Beach County rank
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('itti of Boynton Beach 1 load N1tit ation Plan
second only to New Orleans on the International Hurricane Research Center's
list of most vulnerable areas in the U.S. mainland. A study commissioned by
South Florida Water Management District (SFWMD) in 2006 concluded that
the current structural condition of the HHD poses a "grave and imminent
danger," going on to exclaim that the dike "...needs to be fixed now, and it
needs to be fixed right."
The following statement was made by the U.S. Army Corps of Engineers
(USACE) in 1986: "The levees around the edge of the lake protect a
population of over 60,000 located in seven towns around the edge of the
lake, and hundreds of thousands of acres of improved agricultural land from
flooding. Ultimately, a failure of any segment of the Herbert Hoover Dike
System could affect hundreds of thousands of people throughout the south
Florida area, including Miami...The major concern is not with the costs
required to make minor repairs to the levees...but with the consequence of a
complete levee failure. The costs associated with such an occurrence would
be astronomical."
In 2007, the U.S. Army Corps of Engineers declared that the Herbert Hoover
Dike was on the top list of
nation -wide dams in need of
repair. Since then, the Corps has
funded more work on the Herbert
Hoover Dike than for any other
dam construction project in the
nation. The Rehabilitation Project
received $56 million in 2008 and
$74 million in 2009. Multiple
millions have been spent on its
continued repair over the
subsequent years.
Wave erosion damage of Dike caused by
Hurricane Wilma 2005
At this time the USACE continues its rehabilitation efforts and in conjunction
with the South Florida Water Management District (SFWMD), continually
monitors and manages water levels in order to prevent further degradation of
the Dike and its canal system. Until work to stabilize the dike is completed
by the USACE, there is the potential for stability problems and /or seepage to
occur from heavy rainfall raising the level of the lake above 18 feet.
Although Florida has compiled an enviable record in hurricane disaster
management, there has been nothing in recent experience that would
parallel the release of Lake Okeechobee. (From Report of Expert Review Panel Technical
Evaluation of Herbert Hoover Dike Lake Okeechobee, Florida, Prepared for SFWMD)
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A number of outside forces can cause dam failure, including prolonged
periods of rain or flooding, landslides into reservoirs, failure of dams
upstream, high winds, and earthquakes.
Failure due to natural events such as earthquakes or tornadoes is significant
because there is little to no advance warning. It is important to note that
dam failures can result from natural events, human - induced events, or a
combination of the two. Improper
design and maintenance, inadequate
spillway capacity, or internal erosion
>t ,
or piping within a dam may also
{ cause failure. People, property, and
, infrastructure downstream of dams
are subject to devastating damage in
�. -�' the event of failure.
• Nigh *mod Dn.. : . , + m , National statistics show that
$60n11•M1 Maned Dow overtopping of dams due to
Pov•.•e•••
inadequate spillway design, debris
blockage of spillways, or settlement
of the dam crest account for 34% of
all dam failures. Foundation defects,
including settlement and slope instability, account for 30% of all failures.
Piping and seepage cause 20% of national dam failures. This includes
internal erosion caused by seepage, seepage and erosion along hydraulic
structures, leakage through animal burrows, and cracks in the dam. The
remaining 16% of failures are caused by other means, including conduits and
valves. All of these situations could affect the HHD.
USACE Dike Failure Warning System Condition Classifications
Condition Classification Definition
A potential failure situation is developing A
dike failure may eventually occur, but
preplanned actions may moderate or alleviate
failure Time is still available for further
analyses /decisions to be made before failure is
Watch Condition considered a foregone conclusion Even if
failure is inevitable, time is generally available
to issue warnings and /or take preparedness
actions A warning is issued when a safety
situation is observed that may lead to a failure if
left unattended, recognizing that there is no
immediate danger
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There is no danger of dike failure, but flow
conditions are such that flooding is expected to
occur downstream of the spillways While the
Non - Failure Emergency Condition amount of flooding may be beyond the control
of USACE, information of releases from the
spillways will be very useful to the authorities in
reaching any decisions on the need for
evacuation
Failure is imminent or has occurred A failure
either has occurred, is occurring, or is obviously
about to occur. There is no time available to
attempt corrective measures to prevent failure
Evacuation Condition Emergency preparedness agencies are notified
that the embankment or structure is failing. Due
to the short time it will take for flooding to occur,
evacuation of nearby downstream areas should
begin immediately.
Sea Level Rise
Sea Level Rise is a long -term increase in mean sea level occurring in
response to global climate and global tectonic changes as measured using
scientific horizontal control points and benchmarks, or simply measured rises
in the sea. Increasing concentration of greenhouse gases and rising global
air and oceanic water temperatures precede and contribute to sea level rise.
There is much contention on this subject. There are those that disagree with
the theory of manmade global warming. There are compelling and
convincing arguments and advocates on all sides of the issue. Dissenting
voices ask whether we understand the causes of sea level rise well enough to
make confident projections for its course in the future. The weight of
evidence would seem to support the view that with or without proof of global
warming, sea rise is real. But regardless of whether there is climate change,
it's indisputable that certain areas of the sea are rising.
The rate of rise is under fire; many people say this is so slow that it is
ridiculous to even worry about it; there is much argument over whether this
is going to happen in our lifetime or even in our children's lifetime.
Regardless of the disagreements, South Florida is taking the prospect of
global warming seriously.
Florida is considered one of the most vulnerable areas of the country to the
consequences of global climate change, with Southeast Florida being at the
frontline to experience the impacts of a changing climate, especially sea level
rise; and in recognition of the need for immediate, coordinated and visionary
action to address the impacts of a changing climate and provide for economic
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of Boynton Beach 1 lood N1itie,ation Plan
and environmental resilience in Southeast Florida, in 2010 the counties of
Palm Beach, Broward, Miami -Dade and Monroe entered into the Southeast
Florida Regional Climate Change Compact. The City of Boynton Beach is an
active participant in the Compact.
The Southeast Florida Regional Climate Change Compact, ratified on January
10, 2010 by Broward, Monroe, Palm Beach and Miami -Dade Counties,
recognizes the vulnerability of Southeast Florida to the impacts of climate
change and calls for the identification of areas uniquely vulnerable to the
impacts of climate change, especially sea level rise. In January 2011, the
Compact Counties adopted state and federal policies related to the creation
of Adaptation Action Areas and jointly advocated to the Florida Legislature for
the definition of Adaptation Action Areas in Florida law.
Two key planning
horizons are r Annual SOO Lot* at Key WIt
Projected See Laval Mao Range based on USAGE Guidance
highlighted in A Unified 1 I Historic Kay Wo.t Sae Level Rh* hate for Comparison
Sea Level Rise 30 I -- - -
Projection for 2 14I 2
•
Southeast Florida: v ,� �
2030 when sea level a ^Q v
Tv
rise is projected to be a 12 ! *`` '
3 -7 inches and 2060 2
when sea level rise is 0 . _ T__
projected to be 9 -24
inches (see picture). 6 _ _
Sea level is projected 1980 1990 2000 2010 2020 2030 2040 20S0 1060 1
to rise one foot from
the 2010 level between 2040 and 2070, but a two foot rise is possible by
2060. The historic tidal data for the past few decades is illustrated on the
unified projection graphic to provide perspective on the projected rate of
change of sea level.
As part of a nationwide program initiated by the Environmental Protection
Agency to evaluate global climate change, in 2005 the Treasure Coast
Regional Planning Council (TCRPC) published a report entitled Sea Level Rise
in the Treasure Coast Region. The study emphasized that because of its
expansive coastline, low elevations and flat topography, sea level rise is of
particular concern to the State of Florida and thus Boynton Beach.
The main areas of impact in the City of Boynton Beach are expected in the
small area on the Atlantic Coast and areas east of the Intracoastal Waterway
and shorelines on Lake Worth.
The Southeast Florida Regional Climate Change Compact Counties has
concluded that the sea level will continue to rise even if mitigation efforts to
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Cm 01 Botirnton Beac11 1 load Nini2ation Plan
reduce greenhouse gas emissions are successful at stabilizing or reducing
atmospheric CO concentrations. A substantial increase in sea level rise
within this century is likely and may occur in rapid pulses rather than
gradually.
Tsunami
A tsunami is a series of waves created when a body of water, such as an
ocean, is rapidly displaced. A tsunami has a much smaller amplitude (wave
height) offshore, and a very long wavelength (often hundreds of kilometers
long), which is why they generally pass unnoticed at sea, forming only a
passing "hump" in the ocean. Tsunamis have been historically referred to as
tidal waves because as they approach land, they take on the characteristics
of a violent onrushing tide rather than the typical cresting waves that are
formed by wind action upon the ocean. Since they are not actually related to
tides, the term is considered misleading and its usage is discouraged by
oceanographers.
Earthquakes are frequently the cause for tsunami events. Tsunamis are
formed as the displaced water mass moves under the influence of gravity
and radiates across the ocean like ripples on a pond. These phenomena
rapidly displace large volumes of water, as energy from falling debris, such
as a landslide or energy expansion is transferred to the water into which the
debris falls. Tsunami caused by these mechanisms, unlike the ocean -wide
tsunami caused by some earthquakes, generally dissipate quickly and rarely
affect coastlines distant from the source, due to the small area of sea
affected. However, an extremely large landslide could generate a mega -
tsunami that might have ocean -wide impacts.
The first part of a tsunami to reach land is a trough rather than a crest of the
wave. The water along the shoreline may recede dramatically, exposing
areas that are normally submerged. This can serve as a warning of the
approaching crest of the tsunami, although the warning is very short, as the
crest typically arrives seconds to minutes later.
Tsunami events occur most frequently in the Pacific Ocean, but they are a
global phenomenon. Major tsunamis occur about once per decade. Based on
historical data, about 59% of the world's tsunamis have occurred in the
Pacific Ocean, 25% in the Mediterranean Sea, 12% in the Atlantic Ocean, and
4% in the Indian Ocean. All tsunamis are potentially dangerous, even
though they may not damage every coastline they strike. Analyzing the past
150 years of tsunami records shows that the most frequent and destructive
tsunamis to affect the U.S. have occurred along the coasts of California,
Oregon, Washington, Alaska, and Hawaii. However, the State of Florida is
located within the Caribbean area, and over the past 156 years, the
Caribbean has experienced tsunami events. Florida has experienced few
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destructive tsunami or rogue wave events, but there have been several small
events. See Appendix I for the Tsunami hazard area in Palm Beach County.
There is often no advance warning of an approaching tsunami. However,
since earthquakes are often a cause of ..v,
tsunamis, an earthquake felt near a body `. " `
of water may be considered an indication
that a tsunami will shortly follow. "'"'"
The National Weather Service and NOAH
.r
report that the most likely source of
- -o �y , _ earthquake or landslide- triggered
,/ ,� . tsunami that would affect the
,74.- .. ' Atlantic coast of Florida is the
''''-'' Puerto Rican Trench, the deepest
� point in the Atlantic Ocean, which
is an earthquake prone area
' 4
north of Puerto Rico. In the past,
, ,04., tsunamis have caused fatalities in
Puerto Rico as well as the U.S.
Virgin Islands.
a t e . The picture to the left is a
perspective view of the sea floor
of the Atlantic Ocean and the Caribbean Sea. The Lesser Antilles are on the
lower left side of the view
and Florida is on the upper La Palma Landslide Taman Tsunami
right. The purple sea floor
at the center of the view is 0
the Puerto Rican trench, the
deepest part of the Atlantic
Ocean and the Caribbean II " 4
Sea.
Another potential cause
would be the eruption of a�
La Parma Landslide Tsunami La Patina Landslide Tsunam,
volcano on the island of La 4 • . - `
Palma in Spain's Canary ; `' „ 4 0 ir
Islands which could
generate a huge landslide d 4► �`°
and trigger a tsunami that r
would impact the U.S. east s
coast. La Palma is not only `-
the steepest island in the
world but has also been the ki ' --
most volcanically active of
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( ltv of Boynton Beach F lood Mitmation Plan
the Canary Isles in the past 500 years. If this event were to take place, it is
expected that the eastern coastline of the State of Florida would suffer
extensive damage and Toss of life.
Following the devastating Indian Ocean Tsunami in late 2004, the West Coast
and Alaska Tsunami Warning Center (WCATWC) located in Palmer, Alaska
expanded its scope to the U.S. Atlantic and Gulf of Mexico coasts, Puerto
Rico, the Virgin Islands, and the Atlantic coast of Canada. The WCATWC
utilizes the following message communications procedures:
State telecommt.
Local eme egcn cY ��y Ornces 47
J !•hR1tc
USCG, Rath etc Tsunami Warning
C1M1d Center Ge" P'
NOAA eather Wire 1e0Messag
�s t 1
EMWiN N ntRJ G�� Gs /A@
d'"°' of Setvlcxe .�. C s o
Gty Uen� F�OS 1'
Mdaary • l
a alia s FtlmedCllMga ` rn `_"�"3 .�t( "'
z \
I t, �t M.
I MrnAy rweeyn
• o eign contacts ounlnes a5
..„,„tale
NGAA Wealnen
Emergency Alert
Roam System
According to the Palm Beach County Unified Local Mitigation Strategy 2009
(LMS), the threat of a tsunami impacting the City of Boynton Beach is
considered to be extremely low (on the order of 5% or less per century).
The relative vulnerability assessment states that:
• the frequency of a tsunami occurring in the city is considered to be low
• the vulnerability of the City is considered to be high
• the exposure of the City to the effects of a tsunami is high
• the risk to the City is low
These relative terms are not defined any further in the LMS.
Roque Wave
A rogue wave event that occurred in Daytona Beach on July 7, 1992 resulted
in the injury of over 20 people, one death, and damage to many cars parked
and driving in the area close to the coastline. A senior seismologist for the
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( it of 13o \nton Beach 1-Iood flan
U.S. Geological Survey advised that the freak wave, estimated at 27 miles
long and 250 feet wide, apparently was caused by shifting sands from an
underwater landslide. It was estimated the wave peaked at 18 feet high.
The National Weather Service said seas otherwise were 1 to 2 feet at the
time. Undersea landslides are common off Daytona Beach but rarely cause
waves of that size. Authorities ruled out a tidal wave, and no seismic activity
was recorded in the Atlantic Ocean at the time. A weather service
meteorologist said it wasn't weather - related.
There are many kinds of ocean waves, and some of them are definitely huge.
However, not all large waves are rogue waves. Strong storms, such as
hurricanes, can cause large waves, but these waves tend to be relatively
regular and predictable, though certainly capable of causing serious harm to
ships and coastal areas. Undersea earthquakes, coastal landslides and
glacial calving (when a large chunk of a glacier breaks off and falls into the
ocean) can also create enormous and catastrophic waves. Undersea
earthquakes can produce tsunamis, and coastal landslides can produce tidal
waves. These could be considered rogues, but, to a certain extent, they are
predictable -- as long as someone noticed the event that caused them. Such
predictability rules these events out of rogue status.
A true rogue wave arises seemingly out of nowhere and is significantly higher
than the other waves occurring in the area at the time. Exactly how much
higher is open to interpretation -- some sources suggest anything twice as
large as the current significant wave height is a rogue, while others think
anything 33 percent larger classifies. It is probably sufficient to say that any
wave so large that it is unexpected based on current conditions can be
counted as a rogue. A craft navigating 3 -foot waves could encounter an 8-
foot rogue wave. While such a wave would not be a record - breaker, it would
certainly cause problems for a small boat.
Rogue waves also tend to be steeper than most waves. The average ocean
waves may take the form of massive swells,
allowing vessels to maneuver up and down
them, even if they are many feet high.
While scientists have gained a greater
understanding of rogue waves in the last
decade, they are still quite enigmatic. No
one has ever filmed the formation of a rogue
wave in the ocean or followed one through
its entire life cycle. There are very few
** t photographs of rogue waves. For centuries,
the best evidence for their existence was
anecdotal -- the countless stories told by
sailors who had survived one.
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Rogue waves frequently occur in areas known for strong ocean currents. The
Gulf Stream (pictured) which runs up the east coast of Florida, very close to
the City of Boynton Beach and further up the coast of United States, is
another potential rogue wave source. Rogues originating in the Gulf Stream
could be responsible for many of the legends of the Bermuda Triangle.
Not all rogue waves occur in strong ocean currents, however. Scientists
think some waves may be caused by randomly occurring wave
reinforcement. Whenever two waves interact, their wave heights are added
together. If a 5 -meter wave passes over a 10 -meter wave, the result is a
briefly occurring 15 -meter wave. This can happen in the opposite manner as
well. A 15 -meter wave moving across a 10 -meter trough results in a 5-
meter wave. Dozens of waves could be interacting and reinforcing each
other. Once in a while, several waves may come together at just the right
moment and create one huge wave in relatively calm seas. If 10 waves that
are only 5 feet high come together, they will result in a 50 -foot wave. This
fits descriptions of rogue waves that seem to appear out of nowhere and
disappear after just a few minutes. (Grabianowski, Ed. "How Rogue Waves Work ")
Due to the nature of rogue waves, it is unlikely that there would be warning
to the City of this phenomenon.
Sources of Floodwaters in the City of Boynton Beach
Sources of flood waters in the City o Boy nton Beach include:
➢ The Atlantic Ocean
➢ The Intracoastal Waterway
➢ Lake Worth
➢ E -4 Canal
➢ C -16 Lateral Canal
➢ Lake Okeechobee
Boynton Beach's low -ly ing =_= ' ` ,
topography combined with its m° ° ®
Arlo
subtropical climate makes it highly M n 4TH „ ..w, .�...
vulnerable to inland flooding, and LH� W
the areas lying east of Fed Nu..
Highway are particularly vulnerable
to coastal f from storm
surges. = j
In the City of Boynton Beach -
intense or prolonged, concentrated t = 4I "`°''
rain is the primary cause of localized
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( of Boynton Beach Flood N1itieaton Plan
flooding. This overabundance of rainfall creates saturated soil conditions,
after which additional rain causes surface ponding or an overflow of
catchment canals and ponds. This can result in street and yard flooding,
which is regarded as nuisance flooding.
The City of Boynton Beach Flood Insurance Study (FIS) written in 1982
provides
information about
the sources of I% ----r
flooding in the L
City, including iaw
that fact that ! .. _
rapidly rising Fiu
sand dunes and - OAR OAP
seawalls provide WI= RAM
considerable N..
MI ISM MITI
protection along ,
the open coast of � 1
Palm Beach
County. These - t,
dunes and ZONE` k 1' °�"=s NNW
44 ZONE B j /MP MIRI
seawalls are _ BLVD ,.F; 910IN 14 IOU
expected to 4 TL 4 VT7c ZON
remain intact OCEAN
during the 100 -
year storm surge FIRM showing "V" Zone in Boynton Beach
and are considered effective wave energy dissipators. Much of the shoreline
along Lake Worth and the Intracoastal Waterway is protected by bulkheads.
These bulkheads are capable of dissipating wave energy.
Only a small area of Boynton Beach is effected by wave action. Wave
heights greater than 3 feet associated with the 100 -year storm surge on the
Atlantic coast are diminished near the open coast by ascending ground slope
and seawalls. The maximum wave crest elevation at the Atlantic Ocean
shoreline is 11 feet.
No waves are generated across the Intracoastal Waterway in Boynton Beach
due to insufficient fetch length. The fetch is the distance a wave travels; the
greater the fetch, the larger the wave.
Wave heights greater than 2 feet are generated over Lake Worth with wave
crest elevations of up to 9 feet. These waves are diminished by dense
development and higher ground elevations west of the lake.
Two drainage canals intersect the city: the E - runs north and south and the
C -16 runs east and west. The Lake Worth Drainage District (LWDD) controls
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City of Boynton Beach I food NIIttesatlon Plan
the water elevation of these canals. Control structures and flood gates are
monitored to ensure sufficient water is released without letting so much
water go that may threaten the underground aquifer and drinking water.
Rights -of -way, culverts, and bridges must be inspected and cleared quickly of
any blockage so there is continuous free flow of water throughout the
connecting canal system.
Please see Appendix D for a report on canal and waterway ownership,
dedication and maintenance, produced by the City of Boynton Beach Director
of Public Works.
Freauently Flooded Areas in the City of Boynton Beach
The Stormwater Supervisor for the City of Boynton Beach, Louis Johnson,
who is also a member of the Flood Mitigation Plan Task Force, provided a list
of the areas most often reported as having nuisance flooding. Most of these
flooding problems are in older neighborhoods with outdated drainage
features. The newer neighborhoods in the City have properly installed swales
and proper underground infrastructure.
• SE 1 Street from 12 Avenue to E. Woolbright Road
o Low Lying flooding in front of businesses
o No drainage in the area
o Cars wash out
o There is a Stormwater Capital Improvement Project (CIP)
addressing this area (See Appendix N for details)
• NE 1 Street from NE 7th Avenue to NE 3rd Avenue
o Low lying street flooding in front of residential homes
o NE 7th, 8 and 9 Avenue and the 3rd Street corridor area has
experienced a tremendous amount of street flooding caused by
rainfall
o No drainage in the area; street flooding with light rain
o City has created swales in the area to get some of the water off
of the streets to help alleviate some of the flooding
o Stormwater Capital Improvement Project (See Appendix N)
• 700 Block of Ocean Inlet Drive
o Low lying area with street flooding in front of residential homes
o Near the Intracoastal
o One drain on the cul de sac. Water flows away from the drain
o Street floods with a light rain; with a torrential rain, may go into
houses
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it of Boynton Beach f iood N1itw i1ion Plan
o Street should be resurfaced and pitched toward the drain may
be the solution; area is being surveyed
• South Road & East Drive
o Low lying area near Intracoastal just east of the C -16 canal with
street flooding in front of residential homes
o Older community
o Extract water with City vacuum trucks during daytime only
o No drainage in the area
o Some residents will not grant easement for outfall to alleviate
the problem
o Proposed solution is unknown; area is being surveyed
• NE 2" Court to NE 3rd Street on 20 Avenue
o NE 2 Court and NE 30 Avenue, entire intersection floods
almost 200' east on 20 Avenue and also 20' west even with
only a light rain
o Can range from 8 to 10 inches deep in this area
o Low lying street flooding in front of residential homes
o NE 1S Street and NE 6 Avenue intersection floods with the
smallest amount of rainfall. The water heads north towards
Gateway and goes up to the front doors of homes
o 2 Court can flood all the way up onto Gateway Boulevard
o No drainage in the area
o Currently brings City vacuum trucks to area to extract the water
off of the streets to prevent the water from going into the
homes; however, this is only a daytime solution
o Proposed solution is unknown; area being surveyed
• 2800 block of SE 1 Place
o Low lying street flooding in front of residential homes
o No drainage in the area
Please see Appendix E, which includes a terrain map of the City indicating the
six areas mentioned above, along with photographs of flooding in the areas.
The Stormwater Supervisor regularly dispatches vacuum trucks to these
locations to help alleviate the street flooding.
One area that had nuisance flooding problems in the past has now been
mitigated. This is on the 200 block of SE 8 Avenue. The City had most of
the required materials in house and made the repairs for about $175,000 by
installing an exfiltration system that has alleviated the problem.
In the community meeting on April 25 2012 a flooding problem in the
Meadows area was discussed. The problem there seems to be that when it
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C'aty 01 Boynton Beach Flood Mtli.&ation Plan
rains the outfalls in the Meadows' retention ponds get covered by water so
the rainwater fills the ponds and overflows.
Also discussed was the fact that there is no storm drainage on the east side
of Sinclair Street.
The Mission Hill and Chapel Hill areas flood frequently even with a light rain,
again due to the fact that the retention ponds fill up and then overflow.
Property owners that live on Potter Road attended the community meeting
on September 26 and brought photos of recent property flooding. Although
this problem exists on private property, the City staff committed to research
the problem and then to offer advice to correct the problems.
Flood Insurance Rate Maos
In response to mounting losses from flooding nationwide, the United States
Congress initiated the National Flood Insurance Program (NFIP) in 1968.
The program is administered through FEMA. Under this program, FEMA
produces FIRMs (Flood Insurance Rate
Maps), which show areas subject to iJLJUt 6I 1
various levels of flooding under ' z , 01 t � YrYT �
different conditions. This flood risk
information is based on historic, !I "°— -
meteorological, hydrologic, and r,
hydraulic data, as well as open -space -
conditions, flood control works, and
development. The FIRMs are regulatory 4`4'-
documents that identify the Special i 10C, s?"
Flood Hazard Areas (SFHA) where land
use and building requirements of the -
NFIP need to be enforced in order for a community to participate in the NFIP.
The SFHAs identify areas of possible inundation due to both riverine flooding
and coastal flooding. The FIRMs establish flood zones that are used for
floodplain management regulations, to set flood insurance rates, and to
identify where flood insurance is required as a condition of a federally insured
mortgage.
Flood inundation areas shown on the FIRMs for coastal areas are based on
the storm surge and wave action (where applicable) from the flood that has a
1% chance of being equaled or exceeded in a given year (also known as the
100 -year flood or base flood). The regulatory and insurance requirements of
the NFIP are based on the flood data shown on the FIRM. The maps may also
show the extent of stillwater inundation (without consideration of wave
height) from the flood that has a 0.2% chance of being equaled or exceeded
in a given year (also known as the 500 year flood).
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l 111 01 Boynton Beach k lood 'Vlihu,alion Plan
The FIRM for Boynton Beach has been revised to incorporate the latest
available information, including wave height data, to assist the City in
developing the most appropriate and effective floodplain measures. The
FEMA included prediction of wave heights in the Flood Insurance Study, Wave
Height Analysis for the City of Boynton Beach, Palm Beach County (FIS),
dated March 1982. The wave heights are included for coastal communities
subject to storm surge flooding, and to report the estimated wave crest
elevations as the base flood elevations on Flood Insurance Rate Maps
(FIRMs). The City of Boynton Beach is located on the open coast and is
subject to flooding from tidal surges associated with hurricanes. The purpose
of the study is to revise the FIRM for Boynton Beach to include the effects of
wave action associated with flooding from the Intracoastal Water, Lake Worth
and the Atlantic Ocean
at the open coast.
91111 44 Previously, FIRMs were
`�` produced showing only
the elevations stillater due s tor to -
� I ` n the lack of a suitable
"�I d and generally applicable
■�� �I-
,��.�, methodology for
` �-°- -^ estimating the wave
.�' 1521"-----j crest elevations
k
I I
f I
associated with storm
surges. These still
s �'� 1, ° �'"+m =" water elevations were
�� ,F■>,j '°" subsequently stipulated
i1� - ,.� .. in co mmunity floodplain
I management mans ement ordinances
One area of ('if of Bo■nton Beach FIR\1 as the minimum
elevation of the first
floor of new constructions. Communities and individuals had to consider the
additional hazards of velocity waters and wave action on an ad hoc basis.
Because there has been a pronounced tendency for buildings to be
constructed only to meet minimum standards, without consideration of the
additional hazard due to wave height, increasing numbers of people could
unknowingly be accepting a high degree of flood - related personal and
property risk in coastal areas subject to wave action.
The FIRMs for the City of Boynton Beach have an effective date of May 30,
1982. There are three maps for the City. Floodplains designated on the
FIRM are based on the 1% annual flood chance or the 100 -year flood event.
The 500 -year flood event with a 0.2 % annual chance of occurrence is used
to designate other areas of the community, which may have some
vulnerability to flooding. The Flood Zone maps for the City of Boynton Beach
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can be seen in Appendix F. The various flood zones are indicated on the
Boynton Beach map. The first four Flood Zones defined below apply to the
City of Boynton Beach and are in the Special Flood Hazard Area (SFHA). This
is the land area that could be covered by the floodwaters of the base flood (a
flood having a 1- percent probability of being equaled or exceeded in any
given year; also referred to as the 100 -year flood) and where the NFIP's
floodplain management regulations must be enforced. There is a mandatory
purchase of flood insurance that applies for federally backed mortgages in
the SFHA. The requirement also extends to private mortgage companies
backed by the FDIC or other federal agencies. Therefore, many private
mortgage companies also require flood insurance on properties in the SFHA:
• AE Zone - Areas subject to inundation by the 1- percent - annual
chance (also known as the 100 -year flood) flood event determined in a
Flood Insurance Study by detailed methods. Base Flood Elevations
(BFEs) are shown within these zones. Mandatory flood insurance
purchase requirements and floodplain management standards apply.
• AH Zone - SFHAs subject to inundation by the 1% annual chance
(100 -year) shallow flooding (usually areas of ponding) where average
depths are between one and three feet. Base flood elevations derived
from detailed hydraulic analyses are shown in this zone. Mandatory
flood insurance purchase requirements apply.
• ANI ( "Area Not Included ") - An area that is located within a
community or county that is not mapped on any published FIRM
• VE Zone - SFHAs along coasts subject to inundation by the 1%
annual chance (100 -year) flood event with the additional hazards due
to storm - induced velocity wave action. Base Flood Elevations (BFEs)
derived from detailed hydraulic analyses are shown. The V Zone
generally extends inland to the point where the 100 -year flood depth
is insufficient to support a 3 -foot breaking wave. Mandatory flood
insurance purchase requirements and floodplain management
standards apply.
There are two flood zones in the City that are moderate flood hazard areas
and are also shown on the FIRM but are not considered part of the Special
Flood Hazard Area. They are:
• X Zone - An area of minimal flood hazard that is determined to be
outside the SFHA and higher than the elevation of the 0.2% annual
chance (or 500 -year) flood. Shown on some flood maps as the "C"
Zone or the "X" unshaded zone.
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• X500 Zone - An area of moderate flood hazard that is determined to
be outside the SFHA between the limits of the 1% flood and the 0.2%
annual chance (or 500 -year flood). Shown on some flood maps as the
"B" Zone or the "X" shaded zone.
Palm Beach County is an active participant in the Map Modernization
Program. Since September 2000, the county and the 37 municipalities have
been working with FEMA, their contract consultants, local engineering
agencies, the South Florida Water Management District (SFWMD) and the
county's contract consultant in the development of a complete new set of
Flood Insurance Rate Maps (FIRMs). The data being provided to FEMA's
contractor includes new accurate LIDAR developed elevation data obtained
from the U.S. Army Corps of Engineers and from a county contract with
Florida International University. At this writing, the new elevation data is
available for virtually all of the county's topography and covers all critical
areas including on barrier islands, the intra - coastal areas, riverine areas, and
the District's (SFWMD) flood control canal systems and their drainage basins.
In addition, SFWMD completed a hydraulic and hydrology study of the canal
system and the sub - basins to establish the 100 year elevations within the
system. Preparation of maps by the Army Corps was slowed by Hurricane
Katrina and Herbert Hoover Dike priorities. The coordination process
established between all of the agencies listed above should permit faster
coordination of future changes with FEMA, and ensure continued
improvement in the currency and accuracy of the FIRMs. The projected
effective date of the new FIRM for the City of Boynton Beach is June, 2014.
In addition to the FIRM maps there are two numerical models, which predict
the effects of storm surge in Palm Beach County. The older model,
developed by the National Oceanic and Atmospheric Administration, is called
the Sea, Lake and Overland Surges from Hurricanes (SLOSH) model. In
Appendix G, maps illustrate the areas of Palm Beach County vulnerable to
this type of flooding. Recently, the State of Florida acquired another model
for predicting hurricane storm surge as well as wind and property damage.
This model, known as The Arbiter of Storms (TAOS) model, predicts storm
surge height and wind field intensity for Category 1 through Category 5
hurricanes. Appendix G, illustrates the areas of Palm Beach County subject
to flooding during a Category 5 Hurricane. It is important to remember that
the TAOS model projections are based on a Maximum of Maximums (MOM)
or absolute worst case scenario. For this analysis the County has considered
the TAOS model projections as reflecting total, worst case exposure for Palm
Beach County.
FEMA uses the most accurate flood hazard information available and applies
rigorous standards in developing the FIRMs. However, because of limitations
of scale or topographic definition of the source maps used to prepare a FIRM,
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small areas may be inadvertently shown within a Special Flood Hazard Area
(SFHA) on a FIRM even though the property is on natural ground and is at or
above the elevation of the 1- percent - annual- chance flood. This elevation is
most commonly referred to as the Base Flood Elevation, or BFE. Such cases
are referred to as "inadvertent inclusions."
For other small areas, earthen fill may have been placed during construction,
thereby elevating a small area within the SFHA to an elevation that is at or
above the BFE. This construction may have taken place during the time the
engineering study was being performed or subsequent to that study.
Because of the limited extent of the elevated area and the limitations of the
map scale, it may not have been possible for FEMA to show this area as
being outside the SFHA and so these areas have been incorrectly included in
the SFHA on the FIRM.
Recognizing that these situations do occur, FEMA established administrative
procedures to change the designation for these properties on the FIRM.
These processes are referred to as the Letter of Map Amendment, or LOMA,
process and the Letter of Map Revision Based on Fill, or LOMR -F, process
(see Appendix F for an example). Through these processes, an individual
who owns, rents, or leases property may submit certain mapping and survey
information to FEMA and request that FEMA issue a document that officially
removes a property and /or structure from the SFHA. In most cases, the
applicant will need to hire a Licensed Land Surveyor or Registered
Professional Engineer to prepare an Elevation Certificate for the property.
Upon receiving a complete application forms package, FEMA will normally
complete its review and issue its determination in 4 to 6 weeks.
The City of Boynton Beach's FIRM, Flood Insurance Study, and Letters of Map
Amendment are available to the public by contacting the Building
Department. These documents can also be viewed on the FEMA's Map
Service Center website.
Past Flood Events in Boynton Beach and Palm Beach County
Hurricane of July 1926. A Category 1 hurricane with winds of 90 mph made
landfall near Jupiter on the morning of 27 July 1926. This hurricane circled
inland along Florida's east coast and exited the state at the Florida /Georgia
border on 28 July. By that time it had been downgraded to a tropical storm.
Palm Beach County experienced high winds and flooding.
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Hurricane of September 1928. At noon on
September 16, 1928, Florida received word of a
hurricane moving north through the Caribbean
region. This hurricane made Florida landfall .:
near the Town of Palm Beach as a strong
Category 4 hurricane with one of the lowest
barometric pressures ever recorded in this area
(928.9 millibars /27.43 in). This was the 5th
most intense hurricane ever to make landfall in
U.S. territory. It reached Lake Okeechobee with
very little diminished intensity and moved across
the northern shoreline. This sent a massive
storm surge southward flooding lower areas on
the southern and western edge of the lake. Many people in the Lake
Okeechobee area gathered on large barges in the lake while 500 others
sought shelter in nearby hotels. The storm hit at 6 p.m. with 160 mph
winds, causing the lake waters to spill out into the low -lying fields. Dikes
collapsed, nearby houses were swept away by severe flooding, and hundreds
drowned in the onrushing waters. So many people died that rescue workers
were forced to simply tow long lines of bodies along behind their boats. At
least 700 victims were buried in a mass grave at West Palm Beach. In excess
of 2,500 people were killed during this storm's passage. Nearly all the loss of
life was in the Okeechobee area and was caused by overflowing of the lake
along its southwestern shore. While all of central Florida was affected by this
killer storm, Palm Beach County mainly experienced wind damage and
flooding from the associated rains. Damage throughout the region was
estimated at between $25 million and $150 million and $50 million in Puerto
Rico. After the storm, the government helped begin a $5 million flood
control program for the Lake Okeechobee - Everglades region, building an 85-
mile long levee, 34 -38 feet high, along the southern lake shore.
Hurricane of September 1933. This major Category 3 hurricane passed over
Jupiter Island with a barometric pressure of 947.5 millibars. Maximum winds
recorded were 127 mph. There was considerable property damage all along
the Florida east coast, mostly in the area between Jupiter and Fort Pierce.
Severe waterfront damage was reported in Stuart. Minimal damage was
reported from Palm Beach County, although there was some flooding in the
lower areas of the county.
Hurricane of June 1945. This hurricane entered Florida from the Gulf of
Mexico making landfall near Cedar Key and moving east - northeast to exit the
state near St. Augustine. Palm Beach County received heavy rains and high
winds from this storm.
Flood of Fall, 1947. This flood is generally considered to be the most severe
flood recorded in southern Florida. Heavy rainfall, including the rains from
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two hurricanes, occurred over a period of five months. Many parts of Palm
Beach County were flooded for months and there was extensive damage to
dairy pastures and agriculture in general. Such a flooding event would be
much more significant today because of the increase in land development.
Hurricane of August 1949. This Category 3 /Category 4 hurricane made
landfall in Florida between Delray Beach and Palm Beach with winds of 130
mph and a barometric pressure of 954.0 millibars (28.17 in). As it moved
inland, its center passed over the northern part of Lake Okeechobee, but the
levees in that area held and no major flooding occurred. Damages were
estimated at $45 million. Tides of 11.3 ft. at Fort Pierce, 8.5 ft. at Stuart, and
6.9 ft. at Lake Worth were reported. Stuart sustained severe damages from
this storm. Statewide, over 500 people lost their homes as a result of this
storm.
Flood of October 1953. As occurred in 1947, this flood was preceded by five
months of heavier than normal rainfall which included a tropical storm in
October. June through October rainfall was approximately 48 inches. Damage
was heaviest in the beef cattle industry, with extensive losses of improved
pasture land which required supplemental feeding of cattle. Vegetable
growers and dairy farmers also suffered significant losses as a result of this
flood.
Rains of January 1957. On January 21 1957 Palm Beach County received 9
to 21 inches of rainfall within a 24 -hour period. There was severe flooding in
the vegetable garden areas of the county and much crop damage. Some
fields had to be pumped out. Local crop damage was estimated at
$1,000,000.
Flood of June 1959. Heavy rains fell across most of central Florida from 17
June through the 21st. These rains were associated with and followed a
tropical depression, and caused extensive flooding in poorly drained, low -
lying agricultural areas and some residential sections. Considerable pasture
land and some citrus land in Palm Beach County were inundated. Some
highways also sustained damage from these flood waters.
Hurricane Donna of September 1960. Hurricane = "`
Donna was the 6th most intense U.S. Hurricane at - 4
landfall. This storm crossed the Florida Keys into
the Gulf of Mexico then turned back toward the
northeast and struck the Florida mainland just
south of Naples. It then turned north moved
across Ft. Myers, where it turned again to the
northeast, moved across the state, and exited
Florida at just north of Daytona Beach. Rainfall ..
ranged from five to ten inches in an 80 to 100 -
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mile wide belt following this storm's track. Lakes and streams overflowed
their banks and forced the evacuation of many homes throughout central
Florida. The high water closed many roads and inundated considerable
agricultural land. At least 12 people were killed statewide and more than
1,794 were injured.
Hurricane Cleo of August 1964. This small but destructive storm moved
northward into Biscayne Bay on August 27,
s. ' 1964. Palm Beach County received three to five
inches of rain associated with this storm, mostly
in the eastern portion of the county. Most
sustained damage was associated with wind
rather than flooding. In the City of Boynton
', Beach the Intracoastal Waterway flooded all the
way to the Florida East Coast Railway where the
Crossings community is now located.
Rains of October 1966. On October 22, 1966, heavy rains ranging from eight
to ten inches over a 24 -hour period destroyed approximately 4,300 acres of
vegetable crops in Palm Beach County.
Hurricane Agnes of June 1972. Hurricane Agnes moved through the Gulf of
Mexico off Florida's west coast. While it
111.-41 1 never struck central Florida mainland, it
spawned the worst severe weather
outbreak in Florida history. The outer rain
bands covered virtually the entire
peninsula and spawned numerous
tornadoes. There were six people killed
and 40 injured in Okeechobee, one killed
and seven injured in La Belle, 40 injured at
Big Coppit Key, two injured at Bassinger,
three injured in Haines City, four at Crystal
Springs, 11 in. Malabar, and 12 in. Cape Canaveral. Most of those injured
lived in manufactured housing. Damage estimates totaled $5 million to public
property and $36 million to private property.
Hurricane David of September 1979.
Hurricane David moved over the Dominican "'
Republic with winds of 165 mph, but
weakened drastically before reaching "
Florida's east coast. David raked the ,#
eastern coastline of Florida from Palm Beach
County northward. Officially classed as a
minimal hurricane, its strongest winds were 1*
offshore when it officially made landfall
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approximately 20 miles south of
t Melbourne. Tides were three to five feet
above normal along the eye track and one
to two feet above normal elsewhere along
the Florida's east coast. Light to moderate
erosion was reported along the Palm Beach
County coastline. Storm rainfall was quite
variable from location to location. Totals
generally ranged from six to nine inches,
but some stations reported as much as 11
inches during the storm's passage.
Rains of March 1982. On March 28 and 29, 1982, Palm Beach County was
subjected to a severe coastal storm with heavy rains and high winds.
Lantana measured 16 inches of rain over a 24 -hour period. High seas sunk a
Haitian freighter and a total of 11 people were drowned.
Tropical Storm Isidore of September 1984. Tropical Storm Isidore made
landfall near West Palm Beach on September 27, 1984 and moved inland
toward Orlando. Highest winds were 73 mph and rainfall was reported to be
five to seven inches over a 24 -hour period. There was some flooding, but this
occurred mostly in northern Florida.
The Great Thanksgiving Holiday East Coast Storm of 1984. A strong low
pressure system developed east of Florida and coupled with a high pressure
system to produce an extremely strong pressure gradient leading to gale
force winds and high seas along the entire Florida east coast. Heavy rains
fell over most of central Florida, and this surface runoff, coupled with the
wind packing of seawater along the coast, resulted in extensive coastal
erosion and flooding. Many coastal structures were damaged or destroyed,
including several in Palm Beach County.
Tropical Storm Bob of June 1985. On June 23 1985, Tropical Storm Bob
moved across south Florida in a northeasterly direction from Fort Myers to
just north of Palm Beach. Rainfall from this event did minor damage, mostly
along Florida's west coast. Palm Beach County suffered moderate
agricultural losses.
Flood of January 1989. On January 21 and 22, 1989, Palm Beach County
experienced a gale with subtropical storm characteristics that caused
extensive beach erosion and dropped four to six inches of rain across the
county. This caused ponding of water in low -lying areas. Several homes and
a motel were damaged. Road flooding caused several accidents.
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Hurricane Gordon of October 1994. °
Following a similar track to Hurricane a- a
Donna of 1960, Tropical Storm Gordon
crossed the Florida Keys into the Gulf of
Mexico then turned back to the northeast
and struck the mainland Florida Peninsula
near Fort Myers on October 13. It moved
across the state and exited Florida into
the Atlantic just north of Vero Beach on
October 16. Palm Beach County had
experienced a period of extensive growth
during the 1970s and 1980s. Most of this growth took place in the form of
residential and commercial land development in the eastern portion of the
county close to the Intracoastal Waterway and the beaches. The rain event
associated with Tropical Storm Gordon was the most significant rain event to
occur after this period of development. Essentially, the county received 17+
inches of rain over a 3 -day period. Rainfall was not evenly disbursed over
the whole county. Statewide damages associated with Gordon totaled over
$400 million. Agricultural interests sustained $275 million in damages
primarily from the widespread flooding. Vegetable and citrus crops were hit
particularly hard. Exacerbating the flooding associated with Tropical Storm
Gordon was the fact that prior to October, 1994 had been a very wet year for
Palm Beach County. Rainfall recorded through September of that year had
reached 74 inches before the Gordon event occurred. Altogether Paim Beach
County received approximately 100 inches of rain in 1994, making that year
the wettest year since 1913.
Hurricane Erin of August 1995. Hurricane Erin
made landfall near Sebastian Inlet on August a
2, 1995. Brevard County bore the brunt of this
storm with sustained winds of approximately
100 mph. While Palm Beach County was
spared most of the damages associated with
Erin's wind field, heavy rains of up to 8 inches
in 3 hours were associated with the backside of
this storm and flooding occurred in low -lying
areas along the county's northern edge.
The Unnamed Storm of October 1995. Almost exactly one year after the
Hurricane Gordon flooding incident in 1994, a stalled frontal system dropped
over 15 inches of rain on Palm Beach County over a period of 39 hours. In
the intervening year between these two events, some communities in Palm
Beach County had conducted a number of mitigation projects and initiatives
designed to improve drainage and prevent flooding in known flood prone
areas. These mitigation projects and initiatives undoubtedly reduced the
extent of flooding and flood related damages during the 1995 flooding event,
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nevertheless, the county did experience significant flooding again in 1995.
The unnamed storm of 1995 was the worst flooding event in Palm Beach
County in recent history. In the northern part of the county there was over
20 inches within a three -day period.
Tropical Storm Mitch of November 1998.
Hurricane Mitch was one of the deadliest
storms in Atlantic history. By the time it
reached Florida on November 4 and 5th,
1998, it had been downgraded to a tropical
storm. Palm Beach County received minimal
rains from this storm, which passed to the
north of the county. Extensive agricultural •
damage was reported throughout South
Florida.
Unnamed Storm of January 1999. On Saturday January 2, 1999, a cold front
stalled over the northern part of Palm Beach County. Warm, moist air from
the Bahamas became entrained in this frontal system and produced a fairly
localized, intense rain event in northern Palm Beach County. Initial reports
indicated 31 inches of rain in a 12 -hour period. This later turned out to be
an erroneous reading from the recording instrument involved; however, it is
generally recognized that between 18 and 22 inches of rain fell in the
northern third of the county over a 12 to 18 hour period. Flooding was even
more extensive than in the 1995 event. Flooding was extensive along
Northlake Boulevard. Erosion caused the collapse of a portion of I -95 that
was under construction. It is important to note that many of the areas that
experienced flooding in both the 1994 and 1995 rainfall events were not in
designated flood zones. For those areas where the Flood Insurance Rate
Maps (FIRM) did indicate a flooding hazard, these two events both exceeded
the 100 -year storm levels and occurred back -to -back. The 1999 event was
extremely localized, but rainfall exceeded all previous records in specific
areas, and was beyond the design capacity of virtually all drainage systems
in the county.
Br
Hurricane Irene of October 1999.
Hurricane Irene weakened to Tropical
Storm force winds by the time it tracked
north through the Everglades, but it
menaced South Florida and Palm Beach
County with incessant rains and its
sluggish pace. In the end it dropped 10-
20 inches of rain throughout the County,
causing extensive flooding in some
areas. By Friday evening (October 15) 125,000 homes in Palm Beach County
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were without power.
Record Rainfall June - July 2002. On July 14, 2002 a record 37 consecutive
days of rain came to a conclusion. The combined June - July rainfall total
was six inches below the all -time record. June rainfall was 20.16" (12.5%
above normal). The county experienced five days of one inch or more rain.
The water level in Lake Okeechobee rose to 13.57 feet. Because this rainy
period was preceded by an extended dry period and rains were spread over
several days, flooding was limited to street flooding.
Hurricane Frances of September 4, 2004. Frances became a Category 4
Hurricane on August 28 while about 700 miles east of the Lesser Antilles,
then moved generally west northwest and weakened to a Category 2
hurricane while crossing the northwest Bahamas. After stalling for about 12
hours on September 4 in the Florida Straits between Grand Bahama Island
and the southeast Florida coast, the center of the nearly 70 -mile diameter
eye crossed the Florida coast near Sewalls Point, at 1 A.M., September 5,
2004 with the southern eyewall affecting the
extreme northeast portion of Palm Beach County. -
Frances moved farther inland just north of Lake
Okeechobee and weakened to a tropical storm
before crossing the entire Florida Peninsula and
exiting into the Gulf of Mexico just north of
Tampa late on September 5. A South Florida
Water Management District instrument measured
a peak wind gust of 92 mph over the eastern
portion of Lake Okeechobee. The estimated peak
wind gust in the Palm Beach metro area was 91
mph at Jupiter Inlet with a peak wind gust of 87
mph measured by a C -MAN station at Lake
Worth Pier. A maximum storm -total rainfall amount of 13.56 inches was
measured at Palm Beach International Airport with 10.36 inches of that
occurring in a 24 -hour period. Unofficial storm -total rainfalls included 9.56
inches at Boynton Beach, eight inches at Deerfield Beach and 7.18 inches at
Hillsboro Canal. Rainfall flooding was mostly minor except for a few locations
in Palm Beach County which had up to three feet of standing water. A
section of I -95 in Palm Beach County was closed due to a large sinkhole. The
maximum storm surge was estimated to have ranged from two to four feet
along the northeast Palm Beach Coast to one to two feet along the northeast
Broward Coast. Within the confines of the Herbert Hoover Dike, water levels
on Lake Okeechobee fluctuated up to five feet above and below normal.
Coastal beach erosion was moderate in Palm Beach and portions of Broward
counties. Property damage at the coast occurred mainly to marinas, piers,
seawalls, bridges and docks, as well as to boats. Inland structure damage
included 15,000 houses and 2,400 businesses in Palm Beach County. Wind
damage to house roofs, mobile homes, trees, power lines, signs, screened
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enclosures and outbuildings occurred over much of southeast Florida
including areas near Lake Okeechobee, but was greatest in Palm Beach
County. A preliminary damage estimate for Frances in south Florida was
$620 million, including $500 million in Palm Beach, $80 million in Broward,
and $34 million in Miami -Dade. Crop damage in Palm Beach County was
estimated at an additional $70 million to sugar cane and vegetables and
additional heavy losses occurred to nurseries. Florida Power and Light
reported power outages for 659,000 customers in Palm Beach, 590,000 in
Broward, 423,000 in Miami -Dade, 39,200 in Collier, 2,500 in Hendry and
1,700 in Collier. An estimated 17,000 persons sought refuge in public
shelters in Palm Beach County and nearly 7,000 in Broward County.
Hurricane Jeanne September 25, 2004. A SFWMD gauge measured a
maximum storm -total rainfall amount of 10.22 inches over the eastern
portion of Lake Okeechobee. Widespread storm-
total amounts of one to four inches occurred in
-,. most of southeast and interior south Florida with
___ 4 Miami -Dade County and Collier County averaging
one half to one inch. Mostly minor rainfall
flooding was observed except locally in Palm
Beach Gardens, Jupiter and in the farmlands of
western Palm Beach County where it was more
severe. Just three weeks after Hurricane
"lb Frances, Hurricane Jeanne struck the same area
of southeast Florida. Hurricane Jeanne formed
from a tropical depression just east of the
Leeward Islands on September 13. Jeanne made
a clockwise loop for three days in the Atlantic north of Hispaniola before
moving west northwest. It strengthened to a Category 3 Hurricane while
over the northwest Bahamas and then made landfall around 11 P.M.,
September 25 near the south end of Hutchinson Island, nearly coincident
with the landfall point of Hurricane Frances just three weeks before. The 40-
mile diameter eye was not quite as large as Frances, but the southern
eyewall again affected northeast Palm Beach County. After landfall, Jeanne
initially moved along a track similar to Frances, just north of Lake
Okeechobee as it weakened to a tropical storm then turned to the northwest
and moved over the northwest Florida Peninsula. Although slightly smaller
and stronger then Hurricane Frances, winds and pressures over southeast
Florida were remarkably similar to Frances. A South Florida Water
Management District (SFWMD) instrument in the Martin County portion of
Lake Okeechobee measured a 15- minute sustained wind of 79 mph with a
peak gust of 105 mph. In metropolitan Palm Beach the highest official
sustained wind speed was 60 mph with a peak gust of 94 mph from the C-
MAN station at Lake Worth Pier. The lowest barometric pressure of 960.4 mb
was measured at a SFWMD site in the Martin County portion of Lake
Okeechobee. A SFWMD gauge about four miles west of West Palm Beach
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International Airport measured 9.10 inches of rain with 8.79 inches of that
occurring in a 24 -hour period. At Moore Haven, 5.99 inches of rain was
measured. Mostly minor rainfall flooding was observed except in Palm Beach
Gardens, Jupiter and in the farmlands of western Palm Beach County where it
was more severe. The estimated maximum storm surge ranged from two to
four feet along the northeast Palm Beach Coast to one to two feet along the
northeast Broward Coast. Within the confines of the Herbert Hoover Dike,
water levels on Lake Okeechobee fluctuated up to seven feet above and
below normal causing severe flooding of some marinas. Beach erosion was
moderate in Palm Beach. There were no confirmed tornadoes. There were
no known direct deaths but four persons died in the aftermath. Storm surge
and winds at the coast caused damage to condos, marinas, piers, seawalls,
bridges and docks, as well as to boats and a few coastal roadways. Inland
wind damage to building roofs, mobile homes, trees, power lines, signs, and
outbuildings occurred mainly over Palm Beach County and portions of eastern
Glades and Hendry counties. Preliminary damage estimates for Jeanne in
southeast Florida were $330 million, including $260 million in Palm Beach
County, $50 million in Broward and $10 million in Miami -Dade. Agricultural
Damage in Palm Beach County was estimated at $30 million. Florida Power
and Light reported outages occurred to 591,300 customers in Palm Beach
County, 165,900 in Broward, 25,100 in Miami -Dade, 5,200 in Collier, 3,000
in Hendry and 1,500 in Glades. An estimated 12,534 persons sought refuge
in public shelters in Palm Beach County.
Flood of June 5, 2005. Eight inches of rain in three hours caused flooding in
streets and businesses in Boca Raton and in Highland Beach. Cars were
stalled and Federal Highway was closed for a nine -block section from NE 20
to NE 29 Street.
Hurricane Wilma October 24, 2005. Rainfall amounts across South Florida
generally ranged from two to four inches across southern sections of the
peninsula to four to six inches across western
Collier County and around Lake Okeechobee,
with a maximum amount of 7.31 inches in =_ _
Clewiston. There was scattered street flooding.
Wilma was a classic October hurricane which
struck South Florida as a Category 3 hurricane
on October 24th, 2005. Wilma developed from a
tropical depression near Jamaica, a typical •
source region for October tropical cyclones, on
the afternoon of October 15, 2005. It became
the 21st named storm of the season during the J
morning hours of October 17, 2005, which tied
the record for the most named storms in one
season originally set back in 1933. Wilma underwent a rapid intensification
cycle which began on October 18th and ended in the early morning hours of
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C'tt of BoN uton Beach 1 food Mi1e,auon Plan
October 19th, with a central pressure decrease of 88 mb in only 12 hours.
The central pressure reached 882 mb., making Wilma the most intense
hurricane ever in the Atlantic Basin, lower than Hurricane Gilbert in
September 1988. Wilma went on to make landfall on Cozumel Island just off
the Yucatan Peninsula as a strong category 4 hurricane on Friday, October
21st, then drifted erratically over the Yucatan Peninsula through Saturday
evening October 22nd. Wilma began to move off the northeast coast of the
Yucatan Peninsula on the night of the 22nd, then gradually accelerated
northeast over the southern Gulf of Mexico toward South Florida as a strong
mid and upper -level trough over the central United States moved south and
forced a southwesterly steering flow. The hurricane made landfall as a
Category 3 storm shortly before 7 AM Monday, October 24 on the southwest
Florida coast between Everglades City and Cape Romano with maximum
sustained winds of 125 mph and an estimated minimum central pressure of
950 mb. Wilma exhibited a very large 55 to 65 mile -wide eye while crossing
the state, and the eye covered large portions of South Florida, including the
eastern two - thirds of Collier County, extreme northwestern Miami -Dade
County, the southern and eastern third of Hendry County, most of Broward
County, and all of Palm Beach County. The eye also clipped the southeastern
shore of Lake Okeechobee. The eye wall affected virtually all of South
Florida. Around 10:30 AM, a South Florida Water Management District
(SFWMD) meteorological station located at the south end of Lake
Okeechobee reported sustained winds of 103 mph. The highest recorded
gusts were in the 100 -120 mph range. The winds on the back (south /west)
side of the eye wall were as strong, if not stronger, than those on the front
(north /east) side. This goes against the common, but sometimes erroneous,
belief that the strongest winds in a hurricane are always in the right -front
quadrant of the storm. This occurred over much of South Florida, except for
central and southern Miami -Dade County which barely missed the
southwestern portion of the eye wall, and likely contributed to the heavier
damage across Broward and Palm Beach counties compared to slightly lesser
damage across much of Miami -Dade and Collier counties. Wilma moved
rapidly northeast across the state, with an average forward speed of 25 mph.
Wilma exited the east coast over northeastern Palm Beach County near Palm
Beach Gardens around 11 AM Monday October 24th as a Category 2
hurricane with maximum sustained winds of around 105 mph. It traversed
the southern peninsula in about four hours. In Collier, Miami -Dade, Broward,
and Palm Beach Counties, the winds killed a total of five people. Total
damage estimates from all the effects ranged from $9 to $12 billion.
Extensive damage to crops was reported, with an estimated $222 million in
crop damage for Miami -Dade County alone. Damage was widespread, with
large trees and power lines down virtually everywhere, causing over 3 million
customers to lose power. Structural damage was heaviest in Broward and
Palm Beach counties where roof damage and downed or split power poles
were noted in some areas. High -rise buildings suffered considerable
damage, mainly in the form of broken windows. This was observed mainly
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l ity of Hoy nton Beach Flood Mit12.at1on f lan
along the southeast metro areas. An F1 tornado caused snapped power
poles, uprooted large trees, and significant damage to mobile homes. Small
swaths of greater damage elsewhere in South Florida have not been
attributed to tornadoes, but were instead likely caused by "mini- swirls ", small
vortices within the eye wall.
Flood of December 14, 2006. A slow- moving low pressure trough caused
very heavy rains and significant flooding over parts of Palm Beach County.
West Palm Beach International Airport received a total of 8.21 inches of rain
ending at 7 PM on the 15th. Other locations in Central and Southern Palm
Beach County received between six and eight inches of rain. Northern
Broward County received lesser amounts in the two to three inch range.
Several streets and roads were closed in the city of West Palm Beach, with
water reaching up to three feet deep in some areas. Hardest hit was the
neighborhood of Pineapple Park. Many vehicles were stranded in the deep
water, with local police receiving about 120 calls for assistance. No significant
damage was reported to property despite water entering homes and
businesses. Florida Power and Light reported 20,000 customers without
power during the afternoon and early evening hours. Shelters were opened
for people left homeless by the floods, but only five people arrived as of 8:30
PM.
Tropical Storm Noel of October 30 -31, 2007. Tropical Storm Noel moved
north from eastern Cuba across the western Bahamas Islands from October
30 through October 31. The
interaction of Noel with a strong IVA
high pressure area located over
the Mid - Atlantic States produced
strong winds over southeast
Florida and the adjacent waters
well before Noel made its closest
passage to the area early on
November 1. Damage was minor
and mainly confined to a few •
downed power lines. Around
5,000 customers lost power in the
three - county area of Palm Beach,
Broward and Miami -Dade. Rainfall amounts were light, ranging from a half -
inch (0.5) to nearly two inches. As Noel moved north across the western
Bahamas, the strong winds continued across southeast Florida. The event
caused severe beach erosion, coastal flooding, and minor wind damage. The
event lasted into the first few days of November.
Flood of January 22, 2008. Intense rains affected Boynton Beach and the
northwest section of Delray Beach during the late afternoon and evening
hours of January 22nd. Maximum observed rainfall amounts were between
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Clty 01 Bov uton Beach 1 lood MIIULaton Plan
four and six inches in Boynton Beach, although Doppler radar estimated as
much as ten inches of rain fell in just over three hours. Numerous reports of
flooding were reported. A trained spotter reported water flooding houses in
the corridor west of Federal Highway and east of Congress Avenue between
Boynton Beach Boulevard and Woolbright Road. Water rose as high as two
feet along sections of Congress Avenue. Significant flooding was reported at
the parking lot of Boynton Beach Mall. The I -95 on -ramp at Gateway
Boulevard was closed due to the water depth, as were sections of Boynton
Beach Boulevard. Dozens of vehicles stalled and 40 traffic accidents were
reported due to the rain and standing water. The combination of a mid and
upper level trough moving east across South Florida and a developing warm
frontal boundary provided the necessary atmospheric conditions for intense
rains and flooding in the Boynton Beach area on January 22nd.
March 22, 2008. Heavy rain across the Wellington area produced multiple
reports of knee deep water in yards and across roadways. Heavy rain across
central portions of Palm Beach County produced flooded roads and water
approaching structures.
May 24, 2008. Flooding occurred at the intersection of Linton Boulevard and
Congress Avenue in Delray Beach making the intersection impassable.
Flooding was also reported along Nassau Street with water intruding into
some homes. Flood waters were near two feet deep at some locations. A
shortwave (a disturbance in the mid or upper part of the atmosphere which
induces upward motion ahead of it) moved across South Florida during the
afternoon hours allowing multiple severe thunderstorms to develop across
southeast Florida. A total of 8,300 customers lost power due to the severe
thunderstorms in the three - county area of Palm Beach, Broward, and Miami -
Dade counties.
Tropical Storm Fay of August 15 -23, 2008. The center of Tropical Storm Fay
moved across Key West early in the evening of August 18th and into the
mainland of South Florida at Cape Romano shortly before 5 AM on the 19th.
Minimum central pressure was 989 MB at landfall, but continued to decrease
after landfall to 986 MB at Moore Haven on the southwest shore of Lake
Okeechobee. Maximum sustained winds were estimated to be around 60
MPH at landfall, however as the storm tracked across the western Everglades
and Southwest Florida the radar presentation continued to organize and
winds increased to around 65 MPH around Moore Haven. A maximum wind
gust of 79 MPH was recorded on a South Florida Water Management gauge
on Lake Okeechobee as the storm passed. Wind gusts of tropical storm force
were felt area -wide, with sustained tropical storm force winds experienced
over portions of mainland Monroe, Collier, Hendry and Glades counties as
well as the immediate coastal sections of Miami -Dade, Broward and Palm
Beach Counties. Wind damage was most significant in the areas affected by
tropical storm force sustained winds, primarily around Lake Okeechobee and
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('itv of 13ovnton Beach Flood Mitn;atuon Plan
interior sections of southwest Florida, with only minor wind damage
elsewhere. The storm caused over $10 million in beach erosion along Palm
Beach County's coastline. A
maximum rainfall total of "' "" " "' "` " ° ° "P` ° °Fl°
16.17 inches was reported
with this event at Moore
Haven in Glades County.
Flooding from these rains
produced total damage
estimates of $380,000,
primarily in Glades and
Hendry counties. Rainfall
elsewhere ranged from three
to six inches in southeast
Florida, and six to eight
inches in southwest Florida,
with isolated amounts up to
ten inches in coastal Palm
Beach County. All the associated effects of Tropical Storm Fay in South
Florida resulted in one fatality, four injured, and $3.949 million in property
damage. Two tornadoes produced $1.25 million in damage, but caused no
injuries or fatalities. The one fatality and three of the injuries were indirectly
caused by Fay with a traffic accident in Palm Beach County. The direct injury
occurred when a kite surfer on Fort Lauderdale Beach lost control during a
squall and was slammed into a building along A1A. Fay caused tropical
storm force winds, significant rainfall flooding in some areas and two
confirmed tornadoes.
March 11 and 12, 2010 Heavy rain over the metropolitan sections of Palm
Beach County caused flooded streets. At the Palm Beach International
Airport 7.4 inches of rainfall was recorded, with Green Acres reporting 4.65
inches of rain. Portions of Australian Avenue, Banyan Boulevard and Palm
Beach Lakes Boulevard and Palm Beach Lakes Boulevard were impassable
during the morning of the 12 No damage was noted from the flooding, and
overall impacts were minimal due in part to the fact that the most significant
flooding occurred during the overnight hours.
September 3 and 4, 2010 Swells from Hurricane Earl off the mid - Atlantic
coast affected the Palm Beach County waters, causing rough conditions at
local inlets. A charter boat captain died from injuries suffered when he fell
off his boat as he approached Jupiter Inlet in rough seas. Northeast swells of
2 to 3 feet were observed throughout the day, although seas were likely a bit
higher near Jupiter Inlet where the accident took place.
November 13, 2010 Large swells from a distant storm in the Atlantic Ocean
led to large, breaking waves along the southeast Florida coast, most notably
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C►tv ul Bo . yntun Beach 1 loud Mitigation Plan
along the Palm Beach County coast. Reports from ocean Rescue personnel
and off -duty NWS employees indicated breaking waves of 10 to 15 feet along
the Paim Beach County coast. The last 75 feet of the pier at Juno Beach was
closed after seas destroyed 10 to 12 sections of the pier and the railing.
Moderate beach erosion was also noted as the surf ran up all the way to the
dune line across much of the Palm Beach County coast. A small boat flipped
in the rough surf near Palm Beach Inlet, but no one was hurt. A woman was
also thrown into rocks alongside a jetty; however she was not hurt.
August 25, 2011 Hurricane Irene passed over the western Bahamas about
170 miles east of the Florida coast. The western fringes of Irene impacted
southeast Florida with high surf and winds bordering on tropical storm force.
Sustained winds to
' 36 knots with
,3 { ,, w '- gusts to 46 knots
,; _ 4k,- were
k measured
A § � - ' near the coast
: -
:' from Jupiter
through Boynton ,
;' h Beach associated , Nt
with intermittent 1.
squalls. High surf .. al
pounded the Paim Beach County coast as f'
Hurricane Irene passed to the east during the
day. Eight people were injured along Boynton
Inlet when a large wave crashed onto the jetty f "$`A
while onlookers were present. Maximum
storm surge at Lake Worth Pier was 1.28 feet with a maximum tide of 1.55
feet. The Lake Worth pier was damaged by large waves. Railings and some
break away decking planks were lost when large waves hit the pier during
high tide.
October 28 and 29, 2011 A weak frontal boundary across South Florida in
combination with a flow of deep tropical moisture from the western
Caribbean Sea associated with the remnant of Hurricane Rina led to periods
of very heavy rain and significant flooding lasting the better part of four
days. An estimated 2000 customers lost power across South Florida due to
the rain. Rainfall amounts of 6 to 9 inches fell over southeastern Palm Beach
County in less than 6 hours, leading to numerous reports of flooded streets
and some road closures. No reports were received of water entering
structures, but water was deep enough to close maintained roads and
threaten structures.
August 26, 2011 Tropical Storm Isaac moved west - northwest across the
Florida Straits south of the Florida Keys on August 26. The northern edge of
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('o\ of Boynton Beach 1 food Mitigation Plan
the wind and rain area associated with Isaac affected the South Florida
peninsula throughout the day on the 26 Isaac continued on a west -
northwest track into the Gulf of Mexico on the 27 with winds, rain and
flooding continuing over parts of South Florida. Rain bands and winds on the
north side of the circulation of Isaac affected Southeast Florida throughout
the day of the 26 and part of the 27 Highest winds over land were
recorded along and near the southeast Florida
coast where the highest sustained winds
' ranged from 40 -45 mph, with 25 -35 mph
sustained winds over most inland areas as well
as over southwest Florida. Highest wind gusts
ranged from 50 -60 mph over most land areas
to as high as 65 mph along the Atlantic coast
and just offshore. Three -day rainfall totals
ending at 8 AM August 28th ranged from 5 -7
inches across southeast Florida to 3 -5 inches
over interior and southwest Florida. The primary exception was over
northern metro Broward County and much of Palm Beach County where 8 to
12 inches fell, with maximum amounts up to 15 -18 inches from west of
Boynton Beach to Wellington, The Acreage, Royal Palm Beach and
Loxahatchee in a two day period. These areas of his hest rainfall amounts
experienced severe flooding with
communities cut off for several days after °`
the storm. Canals were overtopped. Few
homes suffered water damage, but major
damage was sustained to infrastructure, `
including roads and water management
structures. Major beach erosion was also
observed along the Collier County
beaches, with moderate beach erosion along the Atlantic beaches. All of the
associated effects of Isaac in south Florida resulted in about $17.2 million in
property damage. Specifically, Isaac's inland flood waters resulted in about
$10 million in damages, mostly in Palm Beach and Broward counties.
Damage from beach erosion in Collier and Broward counties was estimated at
$6 million. Wind damage was estimated at $750,000. Approximately
113,000 customers lost power during the storm in South Florida.
Hurricane Sandy October 27 -28, 2012 TS Sandy wreaked havoc along the
southeast Florida coast as it paralleled the coastline on its trek to the north.
Although Sandy did not make landfall across south Florida, it did have a
significant impact, most notably with regard to the large swells produced by
Sandy's large wind field and their impacts on coastal flooding. Sandy was a
Category 1 hurricane while tracking across the Bahamas. Sandy then began
to take on a slight northwestward motion near the northern Bahamas. It is
during this time frame that the offshore Atlantic waters were heavily
impacted by Sandy's passing. Sandy's primary impact to southeast Florida
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C itv of 13o\ nton Beach Flood Mlti Plan
Surface Wind F i l ! 01 Humcane Sands I
"°*'` "��°" `" ��'_ was the large surf which resulted in
significant beach erosion along with
some coastal flooding. The wind
trajectory around Sandy produced an
optimal fetch which lead to the
development of a large, long period NE
swell which affected the waters off of the
southeast Florida coast. The swell
peaked Saturday 10/27- Sunday 10/28.
The pounding surf led to large breaking
waves, estimated to have been as high
as 10 feet at the Miami -Dade County
beaches to around 20 feet, perhaps even
"' "` "°"°H` "
nror NYalp '«' higher, at the Palm Beaches.
rUY wcx � -f1J•c1YMCt o rK K1!CO A 1':7
irxcY 7x^Y#>. .hp{a M.1lhmry a10074o t e. — t" a
Large waves pummeled the entire Southeast Florida coast, resulting in
significant beach erosion. Some coastal flooding also occurred. Along the
Miami -Dade County coast, coastal flooding was mostly minor with the main
impact being a few roads with minor ponding of water. However, coastal
flooding was much worse along the Broward County coast. Significant
coastal flooding occurred along A1A in Fort Lauderdale Beach, mainly
between Las Olas Boulevard and NE 20th
Street. This resulted in this stretch of road
being closed the entire weekend, along with
a few others, as well as some
neighborhoods being cut off. In Palm Beach
County, the most significant impacts were
experienced in the Manalapan area where '
beachfront structures were threatened by Huncane San•
water intrusion. The Lake Worth Pier also `'" tocatiss2111111 7413111
sustained damage from the large waves. In . PIO
all, there was an estimated $14 million in sT �- M ' {
damage sustained in Palm Beach County wr'
from Sandy.
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('H.\ of Boynton Beach Flood Mim,ation Plan
Assess the Flood Problem - Section Six
Overall Vulnerability of Floodinu and Impact on Community
A flood hazard area may or may not have flood problems. Flooding is viewed
as a natural and even beneficial occurrence. A floodplain is only a problem if
human development gets in the way of, or exacerbates, the natural flooding.
Public safety is of paramount concern for the City of Boynton Beach. The
City has made it a priority to educate its citizens on the dangers and impacts
of flooding. The City implements a public outreach strategy that provides
information on flood warnings, property protection, flood safety, and flood
insurance and has developed a comprehensive flood warning program that
can deliver real -time data to citizens and emergency management personnel
through television, radio and the Internet. The City's approach has resulted
in an educated and well- informed constituency.
As Boynton Beach's population has rapidly increased since 1960, so has rapid
water runoff associated with the vast areas of impervious surfaces such as
asphalt roads, concrete areas, sidewalks, and structures created by new
development, often creating flood prone areas where they did not previously
exist. Population risk has may have been exacerbated by some complacency
in the general populace, due to reduced hurricane frequency.
The Stormwater Division of the City of Boynton Beach is responsible for
managing the stormwater runoff on City streets and City -owned property.
The Division inspects and maintains stormwater pipes, catch basins, storm
drains, swales, wet and dry stormwater ponds, and outfalls within the City
limits to ensure that stormwater runoff is managed properly after storms and
rain events. The performance of the stormwater system is continually
monitored and improvements are made as necessary.
Flood damage is proportional to the volume and the velocity of the water, as
with a storm surge. High volumes of water can move heavy objects and
undermine roads and bridges. Although rural flooding is dangerous to fewer
people and may be less costly than urban flooding, it can cause great
damage to agricultural operations.
This section of the Flood Mitigation Plan evaluates the potential impact of
flooding on Boynton Beach with respect to the following:
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Section Six Page 1 of 34
('its of Boynton Beach 1 lood Mitie,ation Plain
o Impact on life, safety, and health of Boynton Beach residents
and incident responders
o Impact on critical facilities
o Impact on existing structures at risk
o Natural and beneficial floodplain functions
o Economic impact
o Repetitive losses
o Impact of flooding and floodplain management on development
and redevelopment trends
Impact on Life, Safety, Health
Although there has not been a flood - related fatality in the City of Boynton
Beach, being a coastal community the deadly hazard associated with coastal
flooding is present. Generally the inland flood hazard in the City is not
considered to pose a serious risk to life.
Floods can bring a variety of health problems: disease and pollutants in the
water; mold, mildew, and sediment left by the flood; and psychological
impacts on flood victims.
Three general types of health problems accompany floods. The first comes
from the water itself. Floodwaters carry whatever was on the ground that
the stormwater runoff picked up, including dirt, oil, and farm and industrial
chemicals, fertilizers, animal waste, trash, etc. The ground can become
saturated with flood waters and this contaminated water eventually makes its
way into the storm and sanitary sewer lines and the waste water treatment
plants Boil water orders may be instituted by the City if the potable water
supply has been, or is thought to have been contaminated. Furthermore,
during floods the overloaded sewer system can back up into homes and low
lying areas, creating a breeding ground for bacteria.
The second type of health problem comes after
the waters have receded. Stagnant pools of
water become breeding grounds for
mosquitoes, while mold and mildew can
develop in parts of buildings that have not been
cleaned and /or dried out A building that is not
thoroughly and properly cleaned becomes a
health hazard, especially for small children and
the elderly.
Finally, there is the potential for long -term psychological impacts due to
seeing damage caused by a flood to one's home, business, personal
belongings, etc. Unprepared and uninsured persons can often feel increased
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('ttv of Bo‘uton Beach Hood MitiL:ation Plan
pressures due to all that accompanies the aftermath of a flood. There is also
a Tong -term problem for those who know that their homes can be flooded
again. The resulting strain on floodplain residents takes its toll in the form of
aggravated health and mental health problems. Children are particularly
susceptible to this post- traumatic stress. The cost and labor needed to repair
a flooded home puts a severe strain on people, especially the unprepared
and uninsured.
When people ignore basic safety precautions such as evacuations and
warnings, injuries and /or accidents are more common.
Roads running through low -lying areas, or areas with poor drainage, as in
some of the older sections of Boynton Beach prone to sudden and frequent
flooding, are a serious
threat. Roads covered`'
with water may cause
confusion to drivers
and may affect
vehicles' braking
systems or leave a car
disabled. Canals near
roadways may be
obstructed from view
by flood waters on
roadways, where the
canal may look like a
road to a driver not familiar with the area.
In the case of storm surge flooding, motorists may attempt to drive through
barricaded or flooded roadways. Because only 18 to 24 inches of water
moving quickly across a roadway can carry away most vehicles, floods can
present significant potential safety risks. Emergency rescue assistance may
be required to remove an individual from a vehicle disabled by high flood
waters, putting emergency responders at risk.
Communities such as Boynton Beach that are subject to sea level rise may
experience an increase in coastal vulnerability. Impacts to communities may
include:
➢ Increased flooding and drainage problems
• Destruction of natural resource habitats
➢ Higher storms surge, increased evacuation areas and evacuation time
frames
➢ Increased shoreline erosion
➢ Saltwater Intrusion
➢ Loss of infrastructure and existing development
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Cit) of Boynton Beach blood NI iti P
Another potential for injuries from flooding results from people walking or
playing in or near flooded areas. During or after any flood event, care must
be taken when entering the waters, whether in a vehicle or by foot, In
addition to dangerous road conditions that may be hidden by the flood
waters, power lines may be down and obscured by the flood waters, putting
people at risk of electrocution. The combination of electricity and water can
prove deadly. Snakes, poisonous insects, and fire ant colonies can be
present in the water posing a serious threat.
There are secondary effects on safety resulting from flooding, including
damage to gas lines, structures, and bridges that may make it unsafe for
emergency operations.
Following are several actions that residents of flood hazard areas can take to
decrease the potential of injury due to flooding. It is wise to be overly
cautious:
✓ Know the flood warning procedures.
✓ Do not attempt to cross a flowing stream where water is above
your knees.
✓ Keep children away from floodwaters, ditches, culverts and
storm drains.
✓ If your vehicle stalls in high water, abandon it immediately and
seek higher ground.
✓ Evacuate the flood hazard area in times of impending flood or
when advised to do so by the police and fire department.
✓ Cut off all electric circuits at the fuse panel or disconnect
switches. If this is not possible, turn off or disconnect all
electrical appliances.
✓ Shut off the water services and gas valves in your home
✓ Be aware of outdoor hazards. Watch out for loose or dangling
power lines, and report them immediately to proper authorities.
It is not unusual in a disaster such as this for more people to be
killed by carelessness in the aftermath than were killed by the
event itself.
✓ Be sure all electric and gas services are turned off before
entering buildings for the first time.
✓ Remove covers from all outlets and fuses or multi- breaker
boxes and flush with dean water. Let dry and spray with
contact cleaner/ lubricant.
✓ Watch for electrical shorts or live wires.
✓ Don't turn on any lights or appliances until an electrician has
checked the system for short circuits.
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City of 130vnton Beach Flood Mitiatton Plan
✓ Electric motors in appliances that have been flooded should be
thoroughly cleaned and reconditioned before they are put back
into service.
Warning and Evacuation of Residents and Visitors
National Weather Service flood watches (when conditions are right for
flooding) and flood warnings (when flooding is imminent) will be issued by
local television and radio stations. Residents in flood prone areas will also be
warned of an actual emergency condition by the sounding of a steady siren
tone provided by Boynton Beach fire and law enforcement mobile units.
When these signals are sounded, residents should turn to their local
television and radio stations for information. To get updated information on
storm preparations, residents can call the Citizen Information Hotline (561)
742 -6921 or additional telephone numbers announced through news outlets.
Palm Beach County is the lead agency in hurricane responses and is
responsible for ordering evacuations when required.
Palm Beach County Division of Emergency Management coordinates disaster
planning, preparedness, response, recovery and mitigation activities for the
County. The County's Emergency Operations Center is centrally located in
West Palm Beach. The Emergency Operations Center (EOC) houses 150
personnel during activations, including the various multi - disciplinary support
functions and the Executive Policy Group. Each of the 38 municipalities,
including the City of Boynton Beach, has a designated emergency
management contact and EOC location during disaster activations. Because
of its size, the County is divided into 6 Emergency Operating Areas (EOAs).
The map in Appendix H shows the geographic coverage of each EOA. As a
hurricane approaches, the City of Boynton Beach takes steps to weather the
storm and to assist the community with recovery. During the hurricane
season, departments are given daily updates on any tropical storms in the
Atlantic. City workers go on alert when a hurricane threatens Boynton
Beach.
Before a storm impacts Boynton Beach, the City will activate an Emergency
Operations Center (EOC) located at Fire Station 5. It is from the EOC that
emergency operations will be directed during and following the storm.
Some areas that would possibly be subject to flooding by storm tides are:
> Zone A /Category 1 hurricane - east of the U.S. 1
> Zone B /Category 3 hurricane - east of the FEC railroad tracks.
Residents and visitors can use the Palm Beach County Evacuation Tool to see
if they are in an evacuation area at http: // maps.co.palm- beach.fl.us /sams /.
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('its of Bo \.nton Beach Flood \1ttiption Plan
A map showing the evacuation zones is included in Appendix I.
Persons living or working in these areas should be
prepared to evacuate as soon as hurricane warnings
are announced and seek shelter in hotels or motels
west of the railroad tracks, an American Red Cross
shelter, or in a friend's or relative's home. Evacuation
should be completed early to avoid gale force winds
and heavy rains that precede the storm's arrival. Palm
Beach County registers individuals who will need
special help during evacuations because of medical
conditions or disabilities. CaII 561 - 712 -6400. The City
will also assist with any evacuations ordered by Palm
Beach County. At the direction of the County, the Red
Cross will open local shelters. The City also has a
Reverse 911 system to notify citizens of critical
evacuation notices.
Radio and television broadcasts will announce the opening of shelters by the
Red Cross for Boynton Beach residents. Most Boynton Beach residents who
want to use public shelters are asked by Palm Beach County to report to
primary evacuation shelters in the city, and should remember that space is
limited. Palm Beach County is responsible for ordering evacuations. A
hurricane evacuation typically is aimed at removing residents from the most
dangerous areas: the barrier island, mobile homes, and low -lying areas.
Public shelters are provided for residents who are unable to find shelter
elsewhere. When a primary shelter is full, newcomers will be directed to
another facility that has been opened by the Red Cross to handle the
overflow.
Policy 7.8.3 in the Boynton Beach Comprehensive Plan, Coastal Management
Element states that, "The City shall annually demonstrate hurricane shelter
space availability for at least 20% of the population increase within the TCEA
associated with hotel /motel and residential developments within the
hurricane vulnerability zone. In the event the City is unable to satisfactorily
demonstrate hurricane shelter space availability, the City shall coordinate
with Palm Beach County Emergency Management and the Red Cross to
provide adequate hurricane shelter space within a timely manner. The City
shall also participate in a Tong -term, Countywide, comprehensive shelter
program coordinated with public, private, non - profit organizations to ensure
adequate shelter space is available for the long -term needs of the TCEA and
the County."
If the area is threatened by a hurricane of "Category 4" intensity or greater,
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(1ty oI Boynton Beach Flood Mitigation Plan
Palm Beach County Emergency Management plans to recommend an
evacuation of the county.
Also stated in the Comprehensive Plan regarding evacuation in Policy 7.8.2,
"The City shall not approve any increases in hotel /motel and residential
densities in the Coastal High- Hazard Area that would increase evacuation
times above the 16 hours level of service (LOS) for out -of- county hurricane
evacuation for a category 5 storm event as measured on the Saffir- Simpson
scale as provided in Section 163.3148(9)(a), F. S."
The table below from the Palm Beach County Emergency Management
website shows the estimated evacuation times for the county and region.
These are only estimates provided to emphasize the importance of early
preparedness. Residents and visitors should not wait until the last minute to
make an evacuation decision.
Palm Beach County Evacuation Clearance Times
Category I Category 2 Category 4
Type of Evacuation Storm in & 3 & 5
Hours
Palm Beach County Only 4 -9 9 -15 12 -17
PB County &Treasure 7 3 /4 - 11 1 /4 13 3 /4 - 17 16 1 /4 - 22 1 /4
Coast
PB County &Lower S.E. 13 1 /2- 19 3 /4 22 1 /2 - 20 1 /2 36 1 /2 - 44 3 /4
Florida
PB County & SE Florida 17 - 23 1 /4 28 1 /4 - 35 1 /2 41 1 /2 - 51
Treasure Coast
Mutual Aid agreements are in place with Palm Beach County and neighboring
municipalities to ensure additional assistance as needed.
As the City of Boynton Beach is a community that is subject to sea level rise,
an impact may include higher storms surge, increased evacuation areas and
evacuation time frames.
Impact on Critical Facilities
As stated in the City of Boynton Beach Comprehensive Plan, "The City shall
discourage hospitals, congregate living facilities for persons with special
needs, nursing homes, and the like from locating within Coastal High- Hazard
Area and shall encourage such existing facilities to relocate to safer locations
within the City."
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In the City of Boynton Beach Fire Rescue Department, maintains a list of
these types of facilities on a priority list. These are the first facilities that the
Fire Rescue Department will check after a flood emergency. They are
required by the County and the City to have an emergency plan in place.
This is verified annually as well as contact information.
Bethesda Hospital, which is located in the City, has an excellent response
team, all the medical help they need, a fire brigade and an emergency
response team.
In Appendix J, maps from the Palm Beach County LMS show Boynton Beach's
critical facilities. The types of critical facilities and infrastructure identified on
the map are:
• schools,
> police stations,
> fire stations,
• specific government buildings,
> nursing homes,
> assisted living facilities,
> hospitals,
> shelters,
• Herbert Hoover Dike,
> Turnpike,
> I -95,
> water treatment facilities and
• airports
Critical facilities include but are not limited to law enforcement and fire
rescue facilities, schools, government facilities, utility facilities, hospitals and
other critical medical facilities, shelters, adult living facilities, etc.
Listed below are the figures of potential dollar losses to critical facilities in
flood prone areas of Boynton Beach. The estimated costs are based upon
information from the Palm Beach County Property Appraiser's database. The
dollar figures express the potential human and major economic impacts
within the City of Boynton Beach.
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City of Bovntun Beach Flood Mitigation Plan
Value of Critical Facilities at Risk from Flo od Hazards
Estimabod
Facility Type (m Mons)
The Pointe at Newport Place Adult Living $9.2
Boynton Beach Fire Fire Department $1.5
Department Station #3
Heartland Healthcare of Nursing Home $1.9
Boynton Beach
Ridge Terrace Health Care Nursing Home $1.6
Center
Boynton Beach High School School /Shelter $26.9
Citrus Cove ES School $7 4
Congress MSE School $5.7
Freedom Shores ES School $8.8
Galaxy ES School $2.4
Poinciana ES School $5.2
Rolling Green ES School $7.5
A New Beginning Assisted Adult Living $.0065
Living
Boynton Beach Fire Fire Station $1.8
Department Station #3
Boynton Beach Fire Fire Station /EOC $3.8
Department Station #5
Simpson Adult Care Facility Adult Living $.0047
Hamlin Place Nursing Home $1 6
Heartland Health Care Center Nursing Home $1.9
It is the responsibility of the City of Boynton Beach Fire Department to
annually update a critical facilities phone list and review any flood response
plans that privately owned critical facilities might possess.
Impact on Infrastructure
Flooding produces a widespread direct and indirect danger to large segments
of the community, potentially incurring the loss or incapacity of such critical
infrastructure elements as roads, Florida Turnpike, I -95, bridges, rail beds,
stormwater drainage systems, potable water and wastewater treatment and
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collection systems and private infrastructure, such as utilities and power
companies. The Public Works and Utilities Departments of the City of
Boynton Beach work diligently to maintain and improve the public
infrastructure in the City and has procedures in place in the event of a flood
emergency.
Railroads in Southeast Florida were built on the coastal ridge with elevated
beds. Because of this, most of the rails are not vulnerable to typical flooding
in the City. While some high volume roads are at elevations low enough to
become inundated, the majority of impacted roadways are local moderate
speed or low volume roads and parking areas.
Evacuation Routes generally are served by bridges which provide access
across waterways to evacuate residents from coastal areas it should be
noted that the approach to these bridges may be of concern.
Impact on the Economy
Business interruptions and failures stemming from disaster events deal a
severe blow to local economies in terms of lost productivity and employment.
Research from a variety of sources, including the US Department of Labor
Statistics, consistently reports that 50% to 70% of businesses either never
reopen after a major disaster or fail after reopening. Small businesses are
represented disproportionately higher among the business casualties. In
Palm Beach County, approximately 80% of businesses have fewer than 10
employees (Truesdale, 2006). Businesses in the County are more inclined to
see their problems as cutting across jurisdictional boundaries.
With the assistance of Palm Beach County Division of Emergency
Management, the Palm Beach County Unified Local Mitigation Strategy 2009
(LMS) conducted impact analyses to assess the potential for detrimental
impacts from flooding hazards.
Aside from direct property damage, the potential economic disruption from
flooding due to hurricanes and tropical storms in Palm Beach County is
significant. Tropical Storm Mitch dropped as much as 10 inches of rain in
some south Florida areas, which resulted in approximately $20 million in
direct crop damage in Palm Beach. The largest employers in the City of
Boynton Beach are not agricultural related, although employees of the
agricultural businesses in the County do reside in Boynton Beach.
The largest employers in the City as of 2007 are as follows:
Company: Du Bois Harvesting
Employees: 400
Product: Agriculture
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Location: Boynton Beach
School Board of Palm Beach County
Employees Countywide: 21,707
Service: Education
Location: Countywide
Bethesda Memorial Hospital
Employees: 2391
Healthcare
Location: Boynton Beach
City of Boynton Beach
Employees: 873
City Government
Location: Boynton Beach
BAMCO Construction, Inc.
Employees: 300
Construction
Location: Boynton Beach
These businesses may have multiple locations and may not be located in a
Special Flood Hazard Area, but again, the employees of these businesses
may be affected if their employer is affected by flooding.
Not only may current industry be affected by flooding, but also industries
that are being recruited to locate in the City and County. The six industries
identified below are targeted by Palm Beach County and the Business
Development Board of Palm Beach County, Inc. These industries are
encouraged to relocate entirely or open a facility in Palm Beach County; or if
presently located in Palm Beach County, to remain and expand in order to
create jobs and to strengthen and diversify the local economy:
• Aviation
• Aerospace
• Engineering
• Agribusiness
• Business
• Financial Services
• Communications
• Information Technology
• Medical
• Pharmaceutical
• Health Care
• Tourism
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( itN of BotiMon Beach Flood MitiLtation Plan
• Recreation
• Entertainment
Potential developers and homebuyers may have second thoughts about
buying in the community after learning of or seeing the typical types of
nuisance flooding or the potential of sea level rise that can affect a business's
traffic or access to a home. Local realtors have stated that after seeing
flooded streets in front of a house, potential buyers have decided they were
not going to buy a particular house regardless of the updated kitchen or
spacious backyard.
The greater values reflected in the financial impacts are the low density and
irregular residential properties proximate to the coast. These coastal
residential properties are generally waterfront with ocean access and
therefore with high taxable value. Additionally, the roads that access these
residential areas are lower than the finished floor elevation of the homes and
therefore subject to inundation prior to impacts to the homes.
The Southeast Florida Regional Climate Change
Compact represents a joint commitment of Broward,
CLIMATE Miami -Date, Monroe and Palm Beach Counties to
CHANGT partner in mitigating the causes and adapting to the
consequences of climate change. Specific
accomplishments of the compact include the development of regionally -
consistent methodologies for mapping sea -level rise impacts, assessing
vulnerability, and understanding the sources of regional greenhouse gas
emissions. The City of Boynton Beach is represented by the Assistant City
Manager, who is a member of the Staff Steering Committee of the Compact.
Collectively, these work products provide the foundation for the Regional
Climate Action Plan, which calls for concerted action in reducing greenhouse
gas emissions and adapting to regional and local impacts of a changing
climate. The recommendations presented in the Regional Climate Action Plan
aim to accomplish those goals while also serving to protect the assets of the
region's unique quality of life and economy, guiding
future investments, and fostering livable, sustainable
and resilient communities. Additionally, the continued �/�'
and enhanced role of policy advocacy through regional �/
collaboration, especially during tumultuous economic Regional Climate
and political times, are important to ensure that current LEADERSHIP suM #I'
efforts are not undermined and the Compact Counties'
future efforts related to sustainability are achieved.
All of the Compact Counties are vulnerable to Sea Level Rise (SLR).
However, the degree and extent of potential impacts vary across the region
due to differences in land elevation and geomorphology. The southernmost
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('1t\ ui Bo ni n Beach Hood ,Nilti <,Lation Plan
counties are expected to experience the greatest direct impacts, with
lessening impacts as one travels northward. Nearly 80 percent of the lands
potentially affected regionally in the one -foot scenario are conservation
lands, especially coastal wetlands. Low lying natural systems made up of
buttonwood, mangrove, scrub mangrove, and herbaceous coastal saline and
freshwater wetlands are significantly impacted in all SLR scenarios. The
upper estimate of current taxable property values in Monroe, Broward, and
Palm Beach Counties vulnerable in the one -foot scenario is $4 billion with
values rising to more than $31 billion at the three -foot scenario. The greater
values reflected in the financial impacts are coastal residential properties with
ocean access and high taxable value.
The Regional Climate Compact Action Plan includes several recommendations
addressing the designation and implementation of Adaptation Action Areas
which are expected to aid in focusing technical assistance and funding
opportunities to areas most vulnerable to the impacts of sea level rise and
coastal flooding. In 2011, the Florida Legislature amended state law to
provide for Adaptation Action Areas as an optional designation in local
comprehensive plans for those identified areas experiencing coastal flooding
due to extreme high tides and storm surge and the related impacts of sea
level rise. The law also provides for the development of adaptation policies
and will maximize funding opportunities for infrastructure needs associated
with Adaptation Action Areas. Subsequent to recent changes to state law,
members of Congress have since requested the definition of Adaptation
Action Areas in federal law to provide for appropriations for adaptation
planning and infrastructure needs in designated areas. It is realistic to
believe that future funding opportunities will become available through
federal and state appropriations and grants for Adaptation Action Areas or
areas similarly designated for adaptation planning.
While the definition and boundary of the Coastal High- Hazard Area (CHHA) is
standardized as the category one storm surge zone as delineated by the
SLOSH model (please see Appendix G), there is no standard boundary for the
Adaptation Action Area. If a community chooses to designate an Adaptation
Action Area, it is up to the local government to decide what property should
be included in the boundary. The main difference between the CHHA and the
Adaptation Action Area is that the CHHA considers current coastal flooding
conditions while the Adaptation Action Area encourages planning for future
vulnerability as well.
Since 2003, Palm Beach County has maintained a more stringent definition of
the CHHA, which includes evacuation zones for hurricane categories one and
two.
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( ,ty of BO' niun Beach Flood Mitu. aeon Plan
Buildings Subject to Flooding
Because the National Flood Insurance Program insures buildings, the impact
of flooding on buildings is a prime concern of the Community Rating System.
A count of the number of buildings affected by each type of flooding informs
planners of the magnitude of the problem. The building count should be done
by use or type of building because flooding affects different types differently.
For example, a commercial or industrial building is likely to suffer more dollar
damage than a house and have a bigger impact on the community if it has to
close because of flooding or flood damage.
Based on analyses of property records, values for residential contents at risk
are assumed to be approximately 80% of the appraised value of the
structure. Values for commercial contents and inventory at risk are assumed
to be 175% of the appraised value of the structure.
While the concern for human life is always of utmost importance in preparing
for a natural disaster, there also are large economic impacts when property
damages are incurred. To be truly sustainable in the face of flooding, the
City of Boynton Beach must work to protect the residents and also to limit,
as much as possible, property losses that slow down a community's ability to
recover from a disaster.
The damaging effects to structures in the beach areas are caused by a
combination of higher levels of storm surge, winds, waves, rains, erosion,
sea level rise and battering by debris. Sea walls and jetties, as well as the
beach area, are all affected and the loss over a period of time becomes
costly. Loss of life and property damage are often more severe because a
storm surge involves velocity wave action and accompanying winds.
Florida not only has the most people at risk from hurricanes, but it also has
the most coastal property
exposed to these storms
and the rainfall and storm
surge that accompanies
them. Over the fourteen
year period between 1980
and 1993, Florida's
population increased by
37% while the value of
insured residential
property rose from $178
billion in 1980 to $418
billion in 1993, an
increase of 135 %. During
this same time period, the insured value of commercial property rose from
$155 billion to $453 billion, an increase of 192 %. Dade, Broward, and Palm
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Beach Counties alone account for $370 billion in insured property (42% of
Florida's total).
The methodology used to estimate the value of residential property at risk
involved a number of compromises using best available data. After
considering the advantages and limitations of the Hazards U.S. Multi- Hazard
(HAZUS -MH) modeling software, the Palm Beach County Unified Local
Mitigation Strategy (LMS) Committee decided instead to use local property
appraisal databases, GIS mapping capabilities and hazard environment
profiles as the basis for identifying and quantifying property and dollars at
risk from key hazards. Those figures were used for this City of Boynton
Beach Flood Mitigation Plan.
Analyses of the types and numbers of existing buildings in Palm Beach
County are complicated by the County's size and diversity, and by highly
variable and incompatible databases and record keeping practices. The
primary data source is the Property Appraiser Database (PAPA). The LMS
concluded that the PAPA database is not well suited for purposes of
vulnerability assessments but it is the best data available.
Deriving an accurate estimate of residential property values at risk from
hazards is complicated by a number of factors. Property Appraiser data is
maintained on a parcel by parcel basis, not by structures. Certain gaps in
values occur because of the diversity of property types. Land values had to
be backed out of assessed property values. Assessments represent market
values, not replacement costs. Homestead exemptions were also backed out
of analyses. Multifamily residential structures (like high rise condominiums,
co -ops, townhouses, zero lot line units) are considered to be understated in
the results. The methodology used to estimate the value of residential
property at risk involved a number of compromises using best available data.
City of Boynton Beach
Number of Insurable Buildings
in the Special Flood Hazard Area
Flood Zone Number of
Buildings
A9 1971
A7 2022
A5 2225
AH 57
Total 6275
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Keeping in mind that an insurable building may be comprised of more than
one address, the number of addresses in Special Flood Hazard Areas (A
Zones) in the City is 11,872.
In the City of Boynton Beach Comprehensive Plan, Policy 7.8.1 states, "The
City shall adopt the definition of the Coastal High- Hazard Area as the area
below the elevation of the category 1 storm surge line as established by a
Sea, Lake, and Overland Surges from Hurricanes (SLOSH) computerized
storm surge model." Since 2003, Palm Beach County has maintained a more
stringent definition of the CHHA, which includes evacuation zones for
hurricane categories one and two.
The number of addresses in the Coastal High Hazard Area in the City of
Boynton Beach is 4095.
Taken from the Palm Beach County Unified Local Mitigation Strategy 2009,
the paragraphs below provide a brief summary of existing residential and
commercial properties in the County:
According to Property Appraiser data, nearly 77 percent of the county's
single family residential units are single story structures, 17 percent
are multi- story, and 6.2 percent are manufactured homes. The
residential housing stock is well distributed throughout the eastern
portion of the County. Forty seven (47) percent of residential units
reside in the unincorporated areas of the county. The seven
municipalities of West Palm Beach, Boca Raton, Boynton Beach, Palm
Beach Gardens, Jupiter, Wellington and Delray Beach collectively have
about 35% of the county's residential units.
The southern municipalities of Boca Raton, Delray Beach and Boynton
Beach collectively have an estimated 46,348 residential units; the
northern municipalities of Palm Beach Gardens and Jupiter have
25,622 units; West Palm Beach in central county has 20,377 units;
and the communities of Wellington and Royal Palm Beach have 24,696
units. The western communities of Belle Glade, Pahokee and South
Bay have approximately 4,850 total residential units.
The overwhelming majority of residential structures (79 %) are of CB
Stucco construction. Thirteen and a half (13 -1/2) percent have
exterior walls of wood in the form of wood siding, wood frame stucco
or board batten. The balance is constructed of a variety of other
materials. The County's database consists of approximately 25
categories, many of which have a multiplicity of variations.
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('1t\ ol Bov nton Beach 1 load Mitn;auon Plan
In the City of Boynton Beach about 0.1% (38) of the residential stock was
built before 1929; 8.2% (3022 units) was built between 1929 and 1959;
61.9% (22,958) between 1960 and 1989; and 29.8% (11,045) between
1990 and 2008. Over 21% of residential units were built before "post-
Andrew" (before Hurricane Andrew in August 1992) building codes were put
into effect. West Palm Beach and Lake Worth have the giant share of oldest
residential units in the Palm Beach County. West Palm Beach, Wellington,
Palm Beach Gardens, Jupiter, and Boynton Beach have the largest post -code
stocks of residential units.
Residential Units by Year Built
Before 1929 38
1929 - 1959 3022
1960 - 1989 22,958
1990 - 2008 11,045
Total before 6/1970 7828
Total before 6/1994 28,627
Source: Palm Beach County Property Appraiser
City of Boynton Beach
Residential Structures by Type
Single - Family/ Single Story 12,585
Single Family/ Multi -Story 1409
Manufactured 437
Total 14,431
Condos, Town Houses, Co -Ops, Commercial Condos, Single -
Family Residence Condos, Zero Lot Line (Units)
Condo 11,798
Condo Commercial 352
Co -Op 233
Townhouse 3754
SFR -C 0
Zero Lot Line 3119
Source: Palm Beach County Property Appraiser
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C►tv of Boynton Beach 1 io& d N11tte,aiion Plan
Non - Residential Units by Year Built
Before 1929 16
1929 - 1959 208
1960 - 1989 685
1990 - 2008 372
Total before 6/1970 402
Total before 6/1994 1013
Source: Palm Beach County Property Appraiser
Non - Residential Building Stock by Use
Commercial 630
Industrial 343
Government 80
Education
Healthcare 8
Other 146
Source• Palm Beach County Property Appraiser
Average Value & Age of All Structures
Average Value $161,181
Average Year Built 1981
Average Age 27
Source: Palm Beach County Property Appraiser
Buildings constructed to current building codes have performed well in recent
severe wind events.
The following pages provide assessments of the dollar values of existing
properties at risk of flooding in the City of Boynton Beach.
Improved Property Values
Commercial Properties 1208
Improved Value (billions) $1.423
Residential Property 18,193
Improved Value (billions) $2.767
Total Improved Value $4,190,345,580.
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Value of Parcels at Risk in Evacuation Areas
Commercial Property 189
Assessed Value (millions) $119.2
Residential Property 1141
Assessed Value $279.8
Vacant Property 183
Assessed Value $108
Ag /Open Space Property 61
Assessed Value $0.209
Value of Parcels at Risk from Historical Flooding
Commercial Property 511
Assessed Value (millions) $880.8
Residential Property 10,324
Assessed Value $1441.3
Vacant Property 921
Assessed Value $70.3
Ag /Open Space Property 587
Assessed Value $0.015
Value of Parcels at Risk from Storm Surge
Commercial Property 116
Assessed Value (millions) $52.1
Residential Property 379
Assessed Value $119.7
Vacant Property 117
Assessed Value $33.5
Ag /Open Space Property 44
Assessed Value $0.136
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City of Boynton Beach Flood N an2,auon Plan
Value of Parcels at Risk from Tsunamis
Commercial Property 445
Assessed Value (millions) $2123
Residential Property 2383
Assessed Value $448.9
Vacant Property 375
Assessed Value $154.1
Ag /Open Space Property 56
Assessed Value $0.081
Historical Flood Insurance Claims
For many years, the risk of significant loss of life and property due to
hurricanes seemed small. Many existing homes and businesses along the
U.S. Atlantic and Gulf Coasts were constructed during the 1970s and 1980s,
a period of relatively inactive hurricane formation. Most of the people
currently living and working in coastal areas have never experienced the
impact of a major hurricane. Hurricanes that impacted Florida during the
1970s and 80s were infrequent and of relatively low intensity. Homeowners,
business interests, and government officials grew to regard hurricane risk as
manageable by private insurance, supplemented occasionally by federal
disaster funding and subsidized flood insurance. The hurricane risk did not
seem sufficient to warrant increased investment in mitigation. Two major
hurricanes, Hugo in 1989 and Andrew in 1992, forced a reevaluation of this
risk assessment.
There are 10,080 flood insurance policies in force in the City of Boynton
Beach, with total annual premiums of $3.3 million. The average annual
premium paid is $325. Because the City exceeds the requirements of the
NFIP, therefore able to be a participant in the Community Rating System
program, policyholders receive a 15% discount on their annual premiums.
The total savings for the residents in premium discounts is $441,000.
Each year FEMA provides every community that participates in the
Community Rating System (CRS) with a list of flood insurance claims filed on
properties in its jurisdiction, with dates of the claims filed and claim payment
amounts. This information is analyzed in the two tables below and on a
spreadsheet in Appendix K.
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( itv 01 Bo' nton Beach Flood 'V1itie,atiou Plan
Paid Flood Insurance Claims By Year in Boynton Beach
$338,199
$340,000
$320,000 --
$300,000
$280,000 -- -
$260,000
$240,000 — -
$220,000
$200,000 -
$180,000
$160,000 --
$140,000 - - - - -- - $1-29,645
$120,000
$100,000 $85,483
$80,000
$60,000 $50,164 $g9�z�
$40,000
$20,000 $13,698 $56,484 $17,512
$3,105 $407 $424 $3,333 $4,591 $—
$-
1979 1981 1982 1984 1992 1993 1994 1995 1998 1999 2000 2004 2005 2008 2009
22 1 39 1 8 1 1 3 30 69 4 29 6 3 1
Number of Claims Each Year
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( it of Bo'nton Beach Flood N1ai ,ation flan
Number Total $
Year of Paid Amount
Claims Paid
Filed
1979 22 $50,164 Includes one payment of $24,000
1981 1 $3,105
1982 39 $85,483 Includes 2 of $16,000
1984 1 $407
1992 8 $49,024 Includes 1 of $26,000
1993 1 $424
1994 1 $3,333
1995 4 $4,591 $1100 - $200 - $3000 - $250
Average Claim = $11,662 ( 6 over
1998 29 $338,199 $25,000)
1999 67 $210,747 Average Claim = $3145
2000 4 $13,698 $8000 - $85 - $4300 - $1400
2004 29 $129,615 Average Claim = $4469
2005 6 $56,484 Includes 1 of $31,000
2008 3 $12,512 $7400 - $1800 - $3300
2009 1 $5,382
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Lity oI Boynton Beach Iloud N1iti ation Plan
Repetitive Loss Properties
Although a significant portion of the city falls within FEMA designated Special
Flood Hazard Areas, flooding can and does occur outside this area. Because
of elevated slabs and effective drainage systems, structural flooding is not
common in the City of Boynton Beach. Nevertheless, the City has five
structures listed by FEMA as repetitive flood loss properties. These are
properties that have had two or more "insured" flood losses of more than
$1000 during a rolling ten year period since 1978.
Each year FEMA provides every community that participates in the
Community Rating System (CRS) with a list of Repetitive Loss (RL) properties
in its jurisdiction with dates of the claims filed.
Use of flood insurance claim data is subject to the Privacy Act of 1974, which
prohibits public release of the names of policy holders and the amount of the
claim payment. Averages or totals and maps showing areas where claims
have been paid can be made public. Therefore the addresses and ownership
of these five properties will be referred to in this document as Property #1,
Property #2, etc. Please see Appendix L, which includes a map of the
Repetitive Loss areas.
For the five RL properties in the City, the most recent flood insurance
payment was a claim for an event twelve years ago in year 2000. Other RL
flood insurance claims paid:
o Year 2000: 2 RL claims
• (1) September 30; rainfall event
• (1) October 2; sewer backup
o Year 1999: 5 RL claims, all for an event on October 15
• Hurricane Irene
• 4 sewer backups; 1 other
o 1998: 4 claims:
• (1) September 17; sewer backup,
• (1) November 5; Tropical Storm Mitch
• (2) November 4; Tropical Storm Mitch and sewer backup
o 1995: 1 RL claim, October 17; unnamed storm; sewer backup
Some facts about the five Repetitive Loss properties in the City of Boynton
Beach follow:
Property #1
➢ Sewer backup problem
➢ Claims dated:
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( it of Boynton Beach Flood N11thLat1on Plan
O 10/15/1999 (Hurricane Irene)
O 09/17/1998 (Rainfall)
O 10/17/1995 (Unnamed Storm)
Property #2
➢ Sewer backup
➢ Claims dated:
O 10/15/1999 (Hurricane Irene)
O 11/04/1998 (Tropical Storm Mitch)
Property #3
➢ Sewer backup
➢ Claims dated:
O 10/15/1999 (Hurricane Irene)
O 11/04/1998 (Tropical Storm Mitch)
Property #4
➢ Pre -FIRM property
➢ Owner at the time met with City officials to learn of low cost loans and
assistance from FEMA to be used to elevate the building. This option
was considered to be too expensive to the owner.
➢ Claims dated:
O 09/30/2000 (Rainfall)
O 10/15/1999 (Hurricane Irene)
O 11/05/1998 (Tropical Storm Mitch)
Property #5
➢ Sewer backup
➢ Claims dated:
O 10/02/2000 (Rainfall)
O 10/15/1999 (Hurricane Irene)
At one time there were twelve Repetitive Loss structures in the City. Seven
of those have been mitigated, or flood protection has been provided and
documentation of such protection has been provided to FEMA. Once
confirmed by FEMA, those seven properties were removed from the City's
RL list. Types of mitigation that protected the structures included:
✓ The City constructed a retention area and emergency pump house on
the corner of SW 6 Avenue and SW 7 Avenue in the vicinity of SW
3 Street which alleviated the drainage problems in one of the RL
areas.
➢ The City solved the flooding problem in another RL area by creating
swales along SE 5 Avenue and SE 1s Street.
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Itv o1 Boynton Beach 1 load Nhtn4auon Plate
✓ A RL property owner took advantage of FEMA assistance and therefore
was able to demolish the property and rebuild a new elevated
structure.
In accordance with CRS guidelines, letters are mailed annually to repetitive
loss property owners by the City of Boynton Beach explaining National Flood
Insurance Program benefits, the availability of mitigation assistance funding
through the Flood Mitigation Assistance program and other mitigation
assistance programs. Letters are also mailed to 115 other properties in the
areas of the RL properties that are subject to the same flood hazard as the
RL properties.
Natural and Beneficial Functions of Flood Prone Areas
Using flood -prone areas for parks and conservation purposes is a strong
flood mitigation strategy since development can be limited in these areas.
Existing vacant land allows the City an opportunity to regulate or limit
development before it occurs. Open and natural areas absorb much more
rain and floodwaters than urbanized areas, reducing flood flows on
downstream properties, and recharge the drinking water supply. These open
spaces also serve as filters of stormwater runoff as it seeps through the
ground and into the aquifer. This aquifer is the only source of drinking water
for the City and this filtering helps contain pollution before it reaches the
aquifer. It is important that we appreciate our open spaces and try to
maintain, preserve and keep these areas clean. Protecting and preserving
these natural and beneficial floodplain functions provides the major benefit of
protecting development from natural disasters and also helps integrate
floodplain management efforts with other community goals and objectives.
In the City of Boynton Beach approximately 243 acres in the Special Flood
Hazard Area (SFHA) are preserved as open space. A portion of this open
space is deed restricted so as to remain in a natural state. The table below
provides details of these areas:
Open Space Areas in "A" Flood Zones
Name of Area Property Flood Approx Type of Area Protection
Owner Zone Acreage
Deed
Meadows I Park City A5 1.75 Open Space Restricted
Deed
Meadows Park City A5 7.2 Open Space Restricted
Boynton Lakes
Park City A5 8.64 Open Space
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( its of Boynton Beach 1 loud N1iti ation Plan
Name of Area Property Flood Approx Type of Area Protection
Owner Zone Acreage
A5,
Portion of E -4 A7,
Canal R/W LWDD A9 21.34 Open Space
Deed
Quantum Park City A5 17.39 Open Space Restricted
FOP Lodge Quantum
Land Park A5 9.96 Open Space
Quantum
Private & Open
Wetland Quantum Space /Natural
Preserve Park A5 4.72 & Beneficial
Intracoastal Open
Park City A7 5.93 Space /N &B
Boat Club Park City A7 6.38 Open Space
Pioneer Canal Deed
Park City A5 0.56 Open Space Restricted
LWDD /SFWMD
City Park Site SFWMD A5 3.82 Open Space
Deed
Wilson Park City A5 0.70 Open Space Restricted
Palmetto
Greens Linear Deed
Park SFWMD A5 2.83 Open Space Restricted
Mangrove Open
Nature Park City A7 12.0 Space /N &B
"Pete's Pond" Open
and area East City A5 9.98 Space /N &B
Future Fire
Station II City _ A9 2.0 Open Space
FPL /Golf Rd
Site City A9 2.61 Open Space
Jaycee Park City A5 2.59 Open Space
Congress Ave
Community
Park) City A9 24.26 Open Space
Palm
Caloosa County Beach
Park County A7 63.71 Open Space
Girl Scout Park City A7 5.73 Open Space
Hunter's Run Property
Golf Course Owners'
(portion) Assoc A9 _ 17.03 Open Space
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( 1lv of Buvnon Beach l loud N11ttvUon Plan
Total and Vacant Acres in Hazard Areas
Coastal Hazard Hurricane
Zone Vulnerability Flood Zones
Zone
Total Vacant Total Vacant Total Vacant
Acres 235.2 50.2 235.4 50.2 2578.9 774.5
100 21.3 100 21.3 100 30.0
Conservation lands in the City are those properties that include
environmental elements that require protection. These lands usually are not
developed or are developed with interpretive features only. Conservation
land in Boynton Beach includes the Seacrest Scrub, the Rosemary Scrub and
the Rolling Green Scrub.
The Boynton Beach Forestry and Grounds
Department's mission statement is, "Enhancing our
physical environment through the conservation of
natural resources, sound management of City 41114°'
green spaces, and participation in the promotion of
landscape beautification throughout the
community." The department maintains over 500 okill t il , �+T .-
non -park green areas including right of ways,
medians, vacant city owned properties, lift stations
and some small finger canals.
The City has qualified to be a Certified Tree City USA for 24 years, meeting
the following standards:
1. A legally constituted tree body
2. A community Tree Ordinance
3. An active, comprehensive community Forestry Program supported
by a minimum of $2.00 per capita
4. An Arbor Day Proclamation and public commemorative tree
planting
The Recreation and Parks Department works to enhance the quality of life
and nurture the health and well -being of the community, economy and
environment. The department wants the public to know that parks are more
than just places in the neighborhood by teaching that assets such as air,
water and land are among the greatest natural treasures and that conserving
green spaces and waterways for the generations to come is crucial for their
very survival.
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it1 01' Bo' nton Beach Flood Nlitiouon Plan
The Future Land Use Element of the Comp Plan states,
Conservation shall be applied to any natural areas acquired within the
City for the purpose of conserving or protecting natural resources or
environmental quality. These areas may be used for wildlife
management, passive recreation and environmental
restoration /protection. No development is allowed in the Conservation
land use category other than site improvements to support uses that
are deemed appropriate and consistent with the function of the
designated area. The City shall coordinate with Palm Beach County to
designate environmentally sensitive lands that are publicly acquired
within the incorporated area as Conservation.
The uses, densities and intensities allowed in the Conservation Overlay
land use category shall be the same as for the underlying land use
category, however, in accordance with the policies contained in the
Conservation Element, a minimum of 25% of native habitat occurring
on any development site shall be preserved; furthermore, mangroves
which occur on these sites shall be preserved consistent with federal,
state, and Palm Beach County regulations, and policies contained in
the Strategic Regional Policy Plan. The City may allow reasonable
intensification of the remainder of sites in this category above the
intensities which are generally permitted for the purpose of preserving
more than 25% of the native habitat on site.
Land development in the City shall be accomplished in a manner which
minimizes erosion, flooding, and other problems due to topography,
including:
"(1) If the property proposed for development is greater than ten (10)
acres, or is a portion of a larger tract containing ten (10) or more
acres of environmentally sensitive lands designated as an "A" rated
site, the developer shall be required to preserve a minimum of twenty -
five percent (25 %) of all native plant communities on the site in one
(1) unified preserve. Habitat shall be preserved with intact canopy,
understory and ground cover.
(2) If the property proposed for development is greater than ten (10)
acres and has been designated as a "B" or "C" rated site, the
developer shall be required to preserve a minimum of twenty -five
percent (25 %) of all native plant communities on the site. The
preserve areas may be separated into micro preserves. Habitat shall
be preserved with intact canopy, understory and ground cover."
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( ►t of Bovnton Beach Flood Maniauon Plan
As stated in the City of Boynton Beach Comprehensive Plan, the City
maintains a local stormwater quality equal to or better than existing levels
for recognized pollutants and conserve, appropriately use and protect the
quality and quantity of waters that flow into the Intracoastal Waterway, in
order to meet the requirements of the Florida Total Maximum Daily Load
Program (TDML) for the Lake Worth Lagoon. In addition, the City maintains
a program of street sweeping roadways and parking areas that dram into the
Intracoastal Waterway.
Through the use of a variety of funding sources such as the general fund,
developer commitments, County, State and Federal grants, bonds, user fees
and impact fees, the City intends to continue to fund the acquisition and
development of parks, open space, recreational facilities, native habitat and
habitat of endangered, threatened and species of special concern.
In conjunction with the State of Florida, the South Florida Water
Management District, the Nature Conservancy, the Trust for Public Lands,
and other appropriate agencies involved in conservation lands to create a
citywide open space system and a greenways /trails /blueways system.
Future Development
Over the last few years, Boynton Beach, like many other US cities was
affected adversely by the economic downturn but is rebounding. The
population experienced an annual average growth of 2% during 2000 -2006
followed by a two year decline in 2007 and 2008. Since 2009 the City's
population has been growing which has generated an ongoing mix of
development and redevelopment activities. This is an indicator that the
economic outlook remains bright.
Any estimates of future building in Palm Beach County have been difficult to
project due to the recent general decline in relocations into South Florida and
the nation -wide economic downturn which brought new construction to a
standstill starting in 2008. The Palm Beach County Unified Local Mitigation
Strategy 2009 has recommended that quantitative and evaluative analyses
of the vulnerability of future residential, commercial and critical services
structures is considered to best be tabled until these factors stabilize or are
reversed.
There are a number of reasons for the good economic outlook. For a number
of years, Boynton Beach lagged behind other municipalities in redevelopment
activities in neighborhoods located east of Interstate 95. The City approved
a number of projects in this area during the last several years. The area will
continue to offer good opportunities for redevelopment.
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Ulty of Bovnton Beach Floud ;\1itnlalIon Plan
The completed downtown waterfront Marina Village project includes two 15-
story buildings and one seven -story building that contains over 300
residential units and over 17,000 square feet of commercial space. Two other
large mixed -use projects approved for the downtown and the surrounding
areas - the Promenade and Las Ventanas - were completed in 2010. A
number of smaller delayed projects are also likely to begin construction
before the end of the year. All these activities are transforming Boynton's
downtown area and positively affected the City's economy.
Recent and continuing projects in the City include:
• Continuing upgrades to our water and sewer system
• Raw water main transmission line from the West Wellfield to the East
Water Treatment Plant
• Renovations to the Old High School
• Major Information & Technology initiative to modernize the City
• ADA Compliance -HUD improvements
Over the last three years the Congress Avenue area has seen major
development in this commercial corridor within the City. Three large mixed -
use projects - Renaissance Commons, Boynton Village and Town Center -
are going to attract new business and residents to the area. A significant
portion of the Renaissance Commons (85% completed) and Boynton Village
and Town Center (50% completed) are expected to be completed between
2014 thru 2017.
Hann Sabo kt Boynton Beach FL Like much of
rams Florida, the number
1600 - 8+00,000 of home sales along
with home values in
0,000 Boynton Beach has
1200 -- _ $300,000 declined since
2007. The median
0000 ,., ;w s 2011 sale prices of
800 _ . _ _ _ _ _ $200,080 ow Clow existing units were
o 48% or more off
600 .- - 1150,000 the peak prices
400 _ - __ k # __` _ k , i , 6100.000 reached in 2006.
s P """" The estimated
200 150.O0° median home value
��� �� for 2011 was
o1 o2o3WQ1o2Q. 3o4Q1 0203040102030410112203Q 1 010203 $195,000 compared
2006 2007 2008 2009 2010 2011 K•, to a value of
$227,000 in 2010. (Source: Realtors Association of the Palm Beaches).
The City has adopted an Economic Development Initiative and
Implementation Plan. The City Commission has prioritized economic growth
CRS Max Consultants, Inc July 2013
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City of Boynton Beach Flood N4itiesation Plcin
and redevelopment in order to build the commercial tax base and grow the
community in all realms of business, i.e. retaining and expanding current
business, attracting new business and housing development and
strengthening the local economy through job creation. With a successful
Economic Development Program, the City will be able to accomplish these
goals. Once the commercial base grows, the residential base will recover.
With the creation of an Economic Development Division within the
Development Department the goals include:
➢ Increase Boynton's economic competitiveness both regionally and
nationally, and as markets open up, internationally. This will attract
new diverse businesses and offer expanded employment opportunities
➢ Diversify the City's economic base of jobs and wages
➢ Provide good housing mix
➢ Explore and enhance destination tourism opportunities
• Develop and promote a strong brand identity and image for Boynton
Beach
As part of the rebranding initiative the City of Boynton Beach, the
Community Redevelopment Agency and the Greater Boynton Beach Chamber
of Commerce have formed an alliance to work closely together to achieve
common goals. The leaders of these entities fully recognize the value of
working together and sharing resources. These three entities represent the
entirety of Boynton Beach. We are committed to expand our community
outreach efforts to inform, educate, and listen to our stakeholders.
In an effort to build and diversify the City's economy, a goal of the
Development Services Division is to promote development in Boynton Beach
that contributes to the diversification of the City's economy with the objective
of promoting economic revitalization through an effective program of
business retention and expansion. The Division will initiate outreach in a
joint City /Chamber of Commerce Business Retention program. Please see
Appendix M for a copy of the document, Policy Statement, The Boynton
Beach Assembly: Committing to our Future.
A goal of the Planning and Zoning Division in FY 2012 -2013 is to foster
dynamic partnership with the business community through the creation of a
comprehensive support and business attraction strategy. The objective will
be to establish proactive initiatives involving networking and coordination
with economic development related organizations; research into business
trends; identification of warranted code changes and temporary relief
provisions in response to difficult economic conditions; and establishment of
streamlined review procedures.
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Cif of Boynton Beach Hood Mttgation Plan
Another objective will be to establish a strong reputation as being the most
"business- friendly" city in Palm Beach County through a personal and tailored
approach to the development review process. A successful partnership will
show an increase in development applications, decrease in application
process time, increase in documented compliments of city processes, and
absence of complaints toward same.
The City considers the proposed Future Land Use Map (FLUM) designation to
be consistent with comprehensive plan policies that encourage an increase in
the amount of land designated for industrial use because of an acute
shortage of such land. This shortage, which has been well documented in a
study commissioned by the Palm Beach County Intergovernmental Plan
Amendment Review Committee (IPARC) and by a City consultant. The City
consultant recommended the City provide and expand industrial land to
improve economic viability. The shortage of land available for industrial use
is the result, in part, of the re- designation of vacant industrial lands to
residential designations during the most recent residential market boom.
The City administers land development regulations that address and regulate
all land uses identified on the Future Land Use Map (FLUM) and administers
the coordination of future land uses with the appropriate topography and soil
conditions. Please see Appendix M for a copy of the Zoning map and Future
Land Use Map for the City.
The City will assure that undeveloped and designated for future park and
recreation sites shall be protected from encroachment by adjacent
development.
With regard to future facilities, the Palm Beach County Unified Local
Mitigation Strategy 2009 suggests that the following must be considered:
• Developable coastal areas of the County in are substantially built out.
Future development is likely to be replacement and upgrading of
existing facilities.
• Development in the Coastal High Area is strictly limited and managed
by local ordinances and codes which tend to meet or exceed those
recommended of the State.
• Future growth throughout the county is guided by the managed
growth tiers described in Land Use section of Special Appendix II of
the Palm Beach County LMS, which consider hazard vulnerability.
• Virtually the whole county is potentially vulnerable to isolated flooding
during excessive rain events, even areas lying outside Special Flood
Hazard Areas.
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('ltv of Boynton Beach Flood Nlid2,atloii Plan
• All new residential, commercial and critical service facilities will be built
to meet or exceed South Florida Building hurricane standards. Several
local developers are now building Category 5 type structures.
U.S. Census Quick Facts Boynton Florida
Beach
Population, 2011 estimate 68,996 19,057,542
Population, 2010 (April 1) estimates base 68,217 18,801,311
Population, percent change, April 1, 2010 to July 1, 2011 1.1% 1.4%
Population, 2010 68,217 18,801,310
Persons under 5 years, percent, 2010 5.8% 5.7%
Persons under 18 years, percent, 2010 19.3% 21.3%
Persons 65 years and over, percent, 2010 21.4% 17.3%
Language other than English spoken at home, percentage 30.5% 27.0%
5 +, 2007 -2011
Housing units in multi -unit structures, percent, 2007- 45.3% 29.9%
2011
Median value of owner - occupied housing units, 2007 -2011 $172,700 $188,600
28,799 7,140,096
Persons per household, 2007 -2011 2.33 2.56
Per capita money income in the past 12 months (2011 $26,887 $26,733
dollars), 2007 -2011
Median household income, 2007 -2011 $45,156 $47,827
Persons below poverty level, percent, 2007 -2011 15.1% 14.7%
Business Quick Facts Boynton Florida
Beach
Total number of firms, 2007 8,843 2,009,589
Manufacturers' shipments, 2007 ($1000) 108,101 104,832,907
Merchant wholesaler sales, 2007 ($1000) 457,449 221,641,518
Retail sales, 2007 ($1000) 1,191,849 262,341,127
Retail sales per capita, 2007 $17,610 $14,353
Accommodation and food services sales, 2007 ($1000) 137,997 41,922,059
Land area in square miles, 2010 16.18 53,624.76
Persons per square mile, 2010 4,217.4 350.6
Thru 2011 the City's population was 68,409. The City's population has
grown from 60,389 in 2000. During the last ten years (2000- 2010), the
growth rate for the city slowed to an average annual rate of Tess than 2 %.
According to the projections provided for the City by the Palm Beach County
Planning Division and the Bureau of Economic Business Research, University
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C a of Boynton Beach Flood N1ttF2,ation Plan
of Florida, Boynton Beach population will increase to 72,336 by the year
2015 and 82,172 by 2025. (other source: US Census)
Population growth in Florida continues to rebound but at relatively low levels
and rates of growth. Historically, Florida's population growth has been driven
by net migration (more people permanently moving into the state than
leaving). However, net migration fell to record low levels during much of
2008 and into 2009. During that time period, natural increase (births minus
deaths) actually exceeded net migration. The low levels of net migration
were largely due to national economic conditions, including weakened
housing markets and other lingering effects from the Great Recession that
make it difficult for people to relocate.
Policy 7.13.1 of the City of Boynton Beach Comprehensive Plan says that,
"The City shall continue to utilize the Community Redevelopment Area Plans,
the Future Land Use Map, and recommendations from the adopted
redevelopment planning studies as basis for a post disaster redevelopment
plan for establishing construction criteria and siting requirements for use in
redevelopment of existing developed properties. This effort would include a
review of the Coastal Construction Building Code, the Current Flood
Protection Ordinance, the Future Land Use Map, Community Redevelopment
Agency plans, and other pertinent recommendations from the "Federal
Highway Corridor Community Redevelopment Plan" and include criteria to
distinguish between immediate repair and long term redevelopment.
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( itv el Boynton Beach 1 loud N9nw,aU«n Plan
Goals - Section Seven
For the purposes of this plan, goals and objectives are defined as
summarized below:
• Goals are general guidelines that explain what is to be achieved.
They are usually broad - based, policy -type statements, long -term, and
represent global visions. Goals help define the benefits that the plan is
trying to achieve. The success of the FMP, once implemented, should
be measured by the degree to which its goals have been met (that is,
by the actual benefits in terms of hazard mitigation that occurs on the
ground).
• Objectives are defined as short -term aims which, when combined,
form a strategy or course of action to meet a goal. Unlike goals,
objectives are specific and measurable.
Goal 1 Protect people from the safety and health hazards caused by
flooding.
Objective 1.1 Ensure that residents are given adequate notification
and warning of floods, and hurricanes.
Objective 1.2 Provide appropriate assistance before, during and after
major flooding events, particularly to the most vulnerable community
members.
Objective 1.3 Provide appropriate education and information
regarding flooding to the community through appropriate and pre-
established methods.
Goal 21 Protect public and private property from damage by floods.
Objective 2.1 Implement effective procedures and processes that
advance local government jurisdictions' and the public's ability to
accomplish mitigation activities in Boynton Beach.
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( m or 13o1nton Beach Flood Mitigation Plan
Objective 2.2 Reduce or eliminate flooding hazards identified to at
risk locations, including repetitive Toss areas and critical facilities,
through mitigation or acquisition.
Objective 2.3 Ensure that new development reduces the possibility of
property damage from flooding by retaining and managing
stormwater, and building to safe elevations.
Objective 2.4 Reduce flooding hazard through strategic planning and
implementations, including updating the Flood Mitigation Plan as
necessary.
Objective 2.5 Reduce flooding hazard through financing, engineering,
constructing and maintaining adequate stormwater drainage facilities.
Objective 2.6 Assist property owners, residents, businesses, non-
profits, and others in understanding and knowing of their eligibility for
grants, loans, and services that may help to mitigate hazards that
directly affect their interests.
Goal 3 Improve the quality of life in Boynton Beach by maintaining,
enhancing, and restoring the natural environment's capacity
to deal with the impacts of flooding.
Objective 3.1 Protect existing natural areas by regulation, acquisition
and /or restoration, particularly in the floodplain.
Objective 3.2 Ensure preservation of open space.
Objective 3.3 Minimize destructive erosion.
Objective 3.4 Optimize utilization of flood mitigation methodologies
that enhance stormwater quality.
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Citv of Boynton Beach I- loud Ninn4ation Plan
Review of Possible Activities - Section Eight
The Flood Mitigation Plan Task Force considered a number of different
floodplain management and hazard mitigation activities. They were
organized under six primary categories:
Preventive
These activities are intended to prevent problems from getting worse. The
use and development of floodprone areas is limited thorough planning, land
acquisition, or regulation. Building, zoning, planning, and /or enforcement
offices usually administer them.
25.Encourage the City's grant writer to pursue appropriate FEMA grants to
enhance flood mitigation, including one or more of the following,
especially those with no matching element::
• Flood Mitigation Assistance Grant
• Hazard Mitigation Grant
• Pre - Disaster Mitigation Grant
• Repetitive Flood Claims
• Severe Repetitive Loss
26.Review City Code of Ordinances to strengthen maintenance requirements
of private stormwater management facilities, including structures
controlling flow.
3. Encourage FEMA to update Flood Insurance Rate Maps (FIRMs) to include
base flood elevations in all Special Flood Hazard Areas.
4. Increase the correction of localized drainage problems so that Level of
Service standards are enhanced.
5. Continue to require that installation of stormwater management facilities
made necessary by new development is the responsibility of the
developer. There are no changes planned in the current approach. This
activity is ongoing.
6. Evaluate the Flood Mitigation Plan, particularly the Action Plan, annually.
7. Update the Flood Mitigation Plan every five years.
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C'tt. of I3ovnton Beach Flood N1i1ia;ation Plan
8. Identify City parks that could be designated permanent open space and
encourage such designation where possible.
9. Review the requirement of designation of open space property for all
development in each of the zoning districts.
10.Implement the following Capital Improvement Program stormwater
project:
Stormwater Master Plan and Updates - Review the status of the City's
stormwater system and develop plans for its ongoing maintenance
and improvement.
11.Encourage drainage solutions such as the use of pervious concrete and
pavement.
12.Look for areas that can be used for storage of floodwaters, such as ball
fields, public rights of way, parks in locations that have flooding problems.
13.Continue to require new commercial development to incorporate historical
drainage patterns in the analysis of the required stormwater storage.
14.Encourage developing provisions for stormwater design management
practices in low- impact development.
15.Complete the inventory of the City's drainage structures.
16.Continue the City's maintenance program to clear debris from stormwater
drainage areas.
17.As part of the City's NPDES program, continue sediment control to
prevent clogged drainage systems such as street sweeping, curb and
gutter cleaning, and planting vegetation on bare ground.
18.Encourage the use of flood prone areas as open space.
19. Continue to support the City's efforts to improve its classification in the
Community Rating System, thus enhancing the City's flood mitigation
efforts while securing insurance premium rewards for its residents and
businesses.
Property Protection
These activities include those undertaken by property owners, on a building -
by- building or parcel basis.
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City of Boynton Beach F lood \1iliiauun Plan
20.Continue to prioritize the reduction of repetitive Toss properties through
various means of mitigation, update repetitive loss forms and remove
properties from the Repetitive Loss List. This is an ongoing activity that
will continue as a top priority of the City's CRS Coordinator, the results of
which will be reported annually to the Flood Mitigation Task Force.
21.Include notification of grants, loans and service availability in all City media
publications, seminars and websites that pertain to flood mitigation.
22. Seek to acquire properties along the Intracoastal Waterway and /or work
with developers when redeveloping commercial or mixed use sites along
the waterway by encouraging that they dedicate the easternmost portions
of land to be used as greenways for public access and use.
23.Collaborate with Florida Communities' Trust to assist with funds in
acquiring properties in SFHA.
24.Collaborate with the Southeast Florida Regional Climate Change Compact
as they make recommendations for land development standards with
respect to low -lying coastal areas.
25. Encourage all property owners to purchase flood insurance.
26.Consider the following forms of retrofitting for areas or buildings with
major flooding issues:
• Install backflow valves on sewer systems
• Elevation of structures by piers, posts and columns, and pilings
• Create a secondary water barrier
• Elevate the lowest floor above the 100 -year flood level
• Wet floodproofing (allowing water to enter uninhabited areas of the
structure)
• Dry floodproofing (sealing the structure to prevent flood waters from
entering)
• Levees and floodwalls (constructing a barrier around the structure to
keep out flood waters)
• Demolition (tearing down the structure and rebuilding with appropriate
floodproofing techniques or relocating the structure)
• Elevate the main breaker or fuse box
27.Encourage floodproofing techniques in order to preserve and revitalize
neighborhoods.
28.Encourage property owners to use qualified hazard mitigation
professionals to inspect building foundations and access damage after
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C av of Boynton Beach Flood 1\ lahi,ation Plan
flood events. FEMA, insurance agents, the State NFIP office and the local
building department can provide contact information.
Natural Resource Protection
These activities preserve or restore natural areas or the natural functions of
floodplain and watershed areas. Parks, recreation, or conservation agencies
or organizations usually implement them.
29.There are no plans for changes to the City's policy to encourage
designation, protection and maintenance of wetlands, mangroves and
environmentally sensitive lands.
30. Identify, inform and encourage home owners' associations to install
littoral /upland buffer plantings around lakes and retention areas.
31.Identify privately -owned and public natural and beneficial areas in the
City and consider expansion of the City's properties that are designated
natural and beneficial areas.
32.Maintain strong enforcement of South Florida Water Management District
and Lake Worth Drainage District regulations pertaining to floodplain
management. The City should continue this current policy as is.
33.Encourage individual property owners to pursue percolation- oriented
drainage improvements using best management practices through
outreach and education. Drainage that seeps into the soil, rather than
being directed out to the ocean, provides multiple benefits. Not only does
it mitigate flooding, but it also recharges the aquifer, enhances water
quality, and reduces erosion.
34.Implement strict enforcement of best management practices for reducing
erosion during development activity. This is current City policy and
should continue as is.
35.Consider dune restoration programs.
Emergency Services
These activities include measures taken during an emergency to minimize its
impact. These measures are the responsibility of city or county emergency
management staff and the owners or operators of major or critical facilities.
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( its of Boynton Beach Flood I\litie,auon Plan
36.Continue the City's procedure which assigns an individual to continually
update information pertaining to hurricane and flood warnings. This
update responsibility will include, but not be limited to, the following
media:
• City website
• Email advisements
• BBTV
• Reverse 911 telephone system
• e- News
• Public Service Announcements through local media (radio,
newspapers, etc.)
• Social media including Twitter and Facebook
• Citizen Hotlines
37.Ensure adherence to the City's Emergency Procedures Manual, particularly
in the event of evacuation orders. Key components of the procedures
should be reviewed before June 1 of each year.
38.Research if the State will provide free sand and sandbags to residents
prior to impending floods.
39.Immediately prior to, during and after a hurricane or flood event, post
pertinent information concerning major points of interest, such as bridge
and road closures, evacuation orders, emergency shelter locations and
electrical outages, utilizing the following media:
• City website
• Email advisements
• Television Government Access Channel
• BBTV
• Electronic message boards
• Reverse 911 telephone system
• e -News
• Public Service Announcements through local media
• Brochure handouts at PODs (Hester Center in Boynton Beach)
• Social media including Twitter, Facebook
40.Continue to ensure optimal staffing of emergency management personnel
to receive and respond to emergency events. This practice will continue
as in the past, in accordance with Incident Command System (ICS)
standards.
41.Integrate response to flooded homes with appropriate response
organizations (CERT, American Red Cross, faith based organizations and
other non - profit entities).
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42.Identify all critical facilities located within SFHAs and make contingency
plans for each, in the event of flooding.
43.Continue to ensure that all public buildings that serve first response and
critical emergency /public needs, including record /data collection and
communication centers /infrastructure, are located outside of flood zones
or floodprone areas.
44.Continue the ongoing training and evaluation of the CERT program.
45. Liability insurance for CERT.
46.Continue to annually update the list of nursing homes and smaller home
care centers (Type 1 group homes) in the City and the priority list of
critical facilities.
47.Continue to confirm that all nursing homes have an emergency plan.
48.Fire Department will continue to keep special registry list and share with
CERT teams.
49.Stormwater crew keeps a registry of problem areas to go to with vacuum
trucks in the event of a flood event.
• Continue the current public works plan for after -hours flooding
50.Continue to explore funding opportunities to retrofit critical facilities to be
more flood and wind resistant.
51.Continue to advertise evacuation routes.
Structural Proiects
These activities keep floodwaters away from an area with a levee, reservoir,
or other flood control measure. They are usually designed by engineers and
managed or maintained by public works staff.
52.Implement the following Capital Improvement Program stormwater
projects:
• Chapel Hill Utility Improvements
• Golfview Harbor Neighborhood Utility Improvements
• Lake Boynton Estates Neighborhood Utility Improvements
• Lakeside /NE 20 Avenue Neighborhood Utility Improvements
• NE 3 Street Stormwater Improvements
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• Replacement Stormwater Pump in stormwater retention
areas
• Stormwater Rehabilitation through the entire City system
• North and South Road Neighborhood Utility Improvements
• Seacrest Corridor Neighborhood Utility Improvements
53.Louis believes that NE 1 St and NE 6th Ave is in the CIP plan as well.
54.On I95 what they did as far as diversion drains, channels, they used the
medians on the interstate because you didn't have to pay for the right of
way . And the way they set it up it didn't interfere with the interstate at
all. As a matter of fact it buttressed the side support.
55.Contact FDOT about water coming off of I -95. The City is now trying to
work with engineers to create a retention pond and try to retain as much
water as possible so it doesn't flood in the communities. Develop more
retention ponds because we want to recharge the ground water aquifer.
So when that water comes off of I -95 like that we really try to find areas
that this water can drain into and retain it on site.
56.Prioritize addressing of flooding issues in repetitive loss areas and
implement capital projects to mitigate flooding. Drainage issues should
continue to be given top priority in the capital improvement program,
particularly in repetitive loss areas. To supplement funding, the City must
continue to be proactive in obtaining funding for this program. The
following sources are recommended:
• Community Development Block Program
• Community Redevelopment Agency
• Flood Mitigation Assistance Grant
• Hazard Mitigation Grant Program
Public Information
These activities advise property owners, potential property owners, and
visitors about the hazards, ways to protect people and property from the
hazards, and the natural and beneficial functions of local floodplains. A
public information office usually implements them.
57.Post contact information so that citizens know how to contact FEMA post -
flood. The City will continue this practice.
58.Based on availability and prioritized needs, provide knowledgeable staff to
assist citizens before, during and after a flood event to help them
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understand their repair /rebuilding /flooding /mitigation options. There are
no plans for changes to this procedure.
59.Assure annual distribution of printed copies of the Palm Beach County
Hurricane Survival Guide in multiple languages at City Hall
60.Post the Boynton Beach Hurricane Survival Guide and a link to the Palm
Beach County Hurricane Survival Guide on the City website in a location
that is easily accessed by the community. There are no plans to change
this practice.
61.Implement the City's Program for Public Information (PPI).
62.Continue to work with County Housing Program to provide education to
homebuyers regarding flood information.
63.CRS should sponsor an informational session and invite the insurance
industry, Florida League of Cities and other interested parties to distribute
information on potential discounts, provide information to contractors and
homeowners on the risks of building in hazard -prone areas and
mitigation, provide the public with Federal Emergency Management
Agency (FEMA) floodplain maps and develop a list of techniques for
homeowner self- inspection and implementation of mitigation activities.
64.Research if the realtor community has a hazard disclosure requirement for
deed transfers, leases or other contracts for sale or exchange of property
in flood hazard areas.
The following recommendations for the Structural Projects section were
offered by Task Force member James Collomore, CFM. Mr. Collomore was
recently retired from Pima County, Arizona Regional Flood Control District in
Tucson, Arizona after 25 years, of which the last 15 years was spent as
Senior Hydrologist in the Floodplain Management Section and Senior
Engineering Assistant in the Planning & Development division:
"There are several site specific problem areas in which an engineering
analysis needs to be performed for each site. For this purpose, I will assume
the following analysis has already been completed for the Capital
Improvement Projects. I offer these comments for the remainder of the site
specific problem areas, in which I have also included verbiage in "lay man's
terms" in parenthesis:
First, detailed hydrologic and hydraulic studies /modeling (drainage studies)
to include land survey need to be conducted for each concentration point
(specific problem location) for the existing condition(s). Hydrologic analysis
for discharge, or Q (flow rate- volume of water- cubic feet /per second) and
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hydraulic analysis (how much water /flow rate is being conveyed thru the
system, i.e., via roadways, culverts, swales, storm sewer pipe, inlet
structures, pump stations, detention /retention ponds and canals) needs to be
determined. The discharge or Q (flow rate) in cubic feet per second (cfs) for
multiple flood frequencies, the Q2 Qi Q 25 and Qioo (the 50 %, 10 %, 4% and
1% chance of flooding based on increased amounts of rainfall respectively)
also needs to be determined. Next, the hydraulic analysis for carrying
capacity or Q (how much water /flow) for multiple flood frequencies that will
be conveyed through the system and contained within the drainage
structures for the existing flood condition needs to be determined. If the
conveyance system /drainage structures are inadequate, it will result in over
land flooding. Subsequently, the flood depths or water surface elevations
need to be examined, and floodplain limits (mapping in a surveyable
manner) would also need to be depicted for the multiple flood frequencies.
Second, alternative drainage design measures for the proposed condition(s)
to mitigate the existing flood condition for each flood problem location need
to be examined. Hydraulic analysis for proposed drainage structural
improvements, using the existing hydrology /Q discharges, for increased size
and capacity of swales, culverts, storm sewer pipe, inlet structures, canals
and detention /retention ponds need to be conducted for multiple flood
frequencies. Comparison analysis of carrying capacities for the multiple flood
frequencies for proposed drainage structures needs to be performed.
Containment of flow for the Qioo, or Base Flood, within the proposed drainage
improvements /conveyance system is most desirable, but may not be
feasible.
Third, the extent of mitigation, and prioritization, needs to be determined on
a case by case basis, based on the severity of each flood problem location
and the cost of proposed drainage structural improvements to reduce or
eliminate the flooding. Cost /Benefit analysis needs to be conducted for the
cost of improvements for multiple flood frequencies. The cost for smaller
drainage capacity structures for more frequent storms, i.e., structures that
will contain the Q2 (or 50% chance of flooding) is less, which may still result
in overland flooding in a Qio, Q25 or Qioo flood event. The cost for larger
drainage capacity structures which will contain the Q (or 10% chance of
flooding) will be more, but may still result in overland flooding in the Qioo
flood event. The cost of drainage structures for "full containment" of the Qioo
flood event will be most, but may be cost prohibitive in most cases.
Provision of drainage improvements for the Q2 or Q flood events are more
feasible and may still be an effective and acceptable means of mitigation.
Last, some flood problem locations, especially those in SFHA's may need a
regional drainage design solution. Acquisition of repetitive loss structures
and /or flood prone properties and engineering design for increased storage
volume of flood waters in detention /retention ponds may be necessary, in
addition to the aforementioned local drainage design measures.
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Pros & Cons
Pros: Hydrology and hydraulic analysis for each problem area may not be
that expensive if the land survey has been completed. It is prudent to do
preliminary hydrology and hydraulic analysis to get a cursory review of the
severity of each problem location. Results of analysis may result in some
acceptable, cost effective Q2 or Qio design fixes.
Cons: To simply perform quick band aid fixes, such as increasing the size of
a culvert or re- grading or creating swales without drainage carrying capacity
analysis and design would most likely be wasting valuable money resources
and man hours. For example, increasing the size of a culvert to the next size
may not provide the necessary carrying capacity for the design Q to be
effective. In fact, you don't even know what the Q (discharge) is without the
hydrology analysis. Also, culvert analysis may show the culvert size may be
adequate, where the culvert "inlet design" upon analysis, may not be, and all
that needs to be modified. There are many variables that need to be visited
in culvert design, as well as storm drain /sewer design, open channel design
for swales and canals, outfall weir design, etc."
Please see Exhibit 6 for a listing of items that were removed from
consideration.
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Action Plan - Section Nine
The following are flood mitigation activities recommended by the City of Boynton
Beach Flood Mitigation Task Force in September 2012. The activities have been
prioritized based on the following criteria:
1. Overall effectiveness to mitigate flooding
2. Feasibility and affordability
3. Reduction of repetitive losses
4. Urgency of need
The Task Force followed a three -step methodology in obtaining the prioritized
action steps listed below. First, there was a meeting with engineering and public
works personnel to review and prioritize according to need the various drainage
improvement projects. Because the capital projects have not all undergone an
official benefit /cost analysis, this important criterion was not initially made a
determining factor for prioritization. However, it is understood by the
engineering and public works team that the benefit /cost analysis is crucial,
especially in consideration of obtaining any FEMA grant funding. Two City of
Boynton Beach staff members have recently attended training to learn how to
prepare their specific cost benefit analysis. Next, these capital projects were
evaluated and prioritized in conjunction with all the other action items. Finally,
the Task Force reviewed the initial prioritization, discussed the implications and
revised the initial prioritization by consensus.
The City's representative to Palm Beach County's Local Mitigation Strategy team
was present at the aforementioned meeting concerning capital projects. The
recommended projects will be presented for inclusion in the County's LMS project
list. Twice a year, April 1st and October 1st, the LMS Evaluation Panel will
review projects submitted by participating municipalities and release an updated
Project Prioritization List (PPL) 30 days later; however, mitigation initiatives will
be accepted year round. If unexpected or multiple funding sources become
available throughout the year that necessitate ranking, the LMS Evaluation Panel
will meet and score submitted projects accordingly. For example this would
occur in the case of Hazard Mitigation Grant Program (HMGP) funding, which
could become available anytime of the year. The Panel encourages mitigation to
be a year -round process of planning and implementing. Please see Appendix 0
which includes the description of the LMS project list submission process and the
required project submission forms.
The priority of the following items may change due to urgency of need, current
events, and funding.
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Action Items
1. Implement the Utility Department capital improvement project named NE 3
Street Stormwater Improvements, which includes NE 1S Street and NE 6th
Avenue in the Heart of Boynton area (See Appendix N for details of project).
Action: This area is from Boynton Beach Boulevard north to the C -16
Canal and from Seacrest east to Railroad Avenue. It includes the City's
Public Works compound, which was a problem with TS Isaac because this
is where the City vehicles are fueled but it was under water; we would not
have been able to fuel our emergency vehicles if there had been five more
inches of rain. Will require an RFQ for a study first and then the design
would follow the study. The NE 1 Street and NE 6 Street area should be
top priority.
Funding: Capital Improvement Program Fund. Will research possibility of
FEMA grant funds. This mitigation project will be submitted to the Palm
Beach County Unified Local Mitigation Strategy (PBC LMS) Project
Prioritization List (PPL).
2. Implement the Utility Department Lakeside /NE 20 Avenue Neighborhood
Utility Improvements capital improvement project (See Appendix N).
Action: Has been on the books for a while and would require an RFQ to
go out for engineering services to study the area and come up with a
design.
Funding: Capital Improvement Program Fund. Will research possibility of
FEMA grant funds. This mitigation project will be submitted to the Palm
Beach County Unified Local Mitigation Strategy (PBC LMS) Project
Prioritization List (PPL).
3. Implement a program to encourage homeowners' associations (HOAs) to
maintain their drainage control structures /systems.
Action: The Utilities Department will create a set of Standard Operating
Procedures for the management companies of the HOAs so that they are
educated as to what they should be doing pre -storm and post- storm.
There should be a checklist for the management companies to follow. This
will empower the HOAs to hold the management companies responsible if
flooding occurs.
Funding: Staff time (operating funds)
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4. Implement the Utility Department capital improvement project named
"Golfview Harbor Neighborhood Utility Improvements ". This area is west of I-
95 (See Appendix N).
Action: Primarily a swale project. To be completed in the next fiscal year
of 2013 -2014.
Funding: Capital Improvement Program Funds. Will research possibility
of FEMA grant funds.
5. Continue City participation in, and compliance with the National Flood
Insurance Program (NFIP) and the Community Rating System (CRS). Seek
CRS classification improvements within capabilities of City programs,
including adoption and administration of FEMA- approved ordinances and flood
insurance rate maps (FIRMs) thus enhancing the City's flood mitigation efforts
while securing insurance premium rewards for its residents and businesses.
Action: This is the responsibility of the Development Department. This is
an ongoing policy and the City will continue its current approach.
Funding: Staff time (operating funds)
6. Implement the Utility Department Chapel Hill Utility /Lake Eden Improvements
capital improvement project. This area is east of I -95 (See Appendix N).
Action: Primarily a swale project. Will be completed in the next fiscal
year of 2013 -2014.
Funding: Capital Improvement Program Funds. Will research possibility
of FEMA grant funds.
7. Encourage all property owners to purchase flood insurance.
Action: This is the responsibility of the Development Department to be
implemented through education and outreach.
Funding: Staff time (operating funds)
8. Encourage drainage solutions such as the use of pervious concrete and
pavement.
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Action: This is current City policy and will continue as is. This is the
responsibility of the Development Department.
Funding: Staff time (operating funds)
9. Provide ongoing training and evaluation of the CERT program.
Action: This is current on -going City policy and will continue as is. The
CERT members meet with the City's Fire Department four times a year.
Two of those meetings are within two months of hurricane season. The
Boynton Beach CERT program is one of the best in the County.
Funding: Staff time (operating funds)
10.Implement the Utility Department North and South Road Neighborhood Utility
Improvements capital improvement project (See Appendix N).
Action: The City has tried to implement this project but it is on hold.
Originally it was a water main and stormwater project. The homeowners
have refused to grant an easement in their side yards for the outfall. This
area is at the seawall. Part of the problem is that the Tots of some of the
newer homes are built at a higher elevation, which has impeded the sheet
flow of water.
Funding: Capital Improvement Program funds. Will research possibility
of FEMA grant funds. This mitigation project will be submitted to the Palm
Beach County Unified Local Mitigation Strategy (PBC LMS) Project
Prioritization List (PPL).
11.Implement the Utility Department capital improvement project called
Replacement Stormwater Pump in Stormwater Retention Areas (See Appendix
N).
Action: This is to help with Utility Department's operations and
maintenance budget. Funded each year basically on an as needed basis.
There is not a specific project area identified. The City may need a
replacement pump if the flow exceeds the pump capacity. These funds
would be used if something comes up that would exceed the operating
budget
Funding: Capital Improvement Program Funds. Could only submit
project for a grant if a specific pump or project is identified.
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12.Encourage the City's departments to come forward with projects to enhance
flood mitigation, particularly in repetitive loss areas and areas of frequent
flooding for which the Grant Coordinator will pursue appropriate grants to
fund the projects. Some examples of available grants are:
• Flood Mitigation Assistance Grant
• Hazard Mitigation Grant
• Pre - Disaster Mitigation Grant
• Repetitive Flood Claims
• Severe Repetitive Loss Grant
Action: The Grant Coordinator will follow up annually on this
responsibility and provide a progress report to the Flood Mitigation Task
Force in August of each year.
Funding: Staff Time (operating funds). Matching funds, if required will
have to be budgeted in or will be assumed by the homeowner if agreed.
13.Assign an individual to continually update information prior to, during, and
after a hurricane or flood event, including road and bridge closures,
evacuation orders, emergency shelter locations and electrical outages. This
update responsibility can include some of the following options:
• City website
• Email advisements
• Television Government Access Channel
• BBTV
• Electronic message boards
• Reverse 911 telephone system
• E -News
• Public service announcements through local media (radio,
newspapers, etc.)
• Social media including Twitter and Facebook
• Citizen Hotlines
• Brochure handouts at Points of Distribution (PODs). The POD
in Boynton Beach is the Hester Center.
Action: This is a current City procedure and will continue as is as a
responsibility of the Boynton Beach Emergency Management Division. The
Standard Operating Procedure written for emergency information
dissemination shall include the items listed above.
Funding: Staff time (operating funds)
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14.Implement the Utility Department Stormwater Rehabilitation through the
Entire City System capital improvement project (See Appendix N).
Action: This is to help our operations and maintenance. Funded each
year basically on an as needed basis. There is not a specific project area
identified. This is used if something would exceed the operating budget.
Funding: Capital Improvement Program Funds. Could only submit
project for a grant if a specific pump or project is identified.
15.Ensure that City crews maintain and operate all flow control structures for
which it is responsible and encourage private and regional entities to do the
same.
Action: This is the responsibility of the Utility Department.
Funding: Staff time (operating funds)
16.Evaluate the City of Boynton Beach Flood Mitigation Plan, particularly the
Action Plan, annually.
Action: The Development Department will be responsible to prepare an
evaluation of the Flood Mitigation Plan, including the Program for Public
Information, for every annual meeting of the Flood Mitigation Plan Task
Force. This responsibility will be ongoing.
Funding: Staff time (operating funds)
17.Update the City of Boynton Beach Flood Mitigation Plan every five years.
Action: The Development Department will be responsible to ensure that
the Flood Mitigation Plan is updated every five years and coordinate the
update with the Palm Beach County Unified Local Mitigation Strategy's
five -year update committee.
Funding: Staff time (operating funds)
18.Enhance communication methods in preparation for, response to, and
recovery from natural hazard events by utilizing social media, smartphone
applications, and other new technology.
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Action: Palm Beach County has introduced a free smartphone app, PBC
DART (Palm Beach County Disaster Assessment and Resource Tool). The
American Red Cross Hurricane app use should b e encouraged. The City's
Emergency Management Division will continue the use of social media and
explore new technology as it becomes available
Funding: Staff time (operating funds)
19.Review City Code of Ordinances and make recommendations, if necessary to
strengthen maintenance requirements of private stormwater management
facilities, including structures controlling flow and prohibiting parking in
swales.
Action: The Utility Department will collaborate with the Building Official,
Code Compliance Division and others to make code revisions that would
improve private stormwater management facilities attenuation.
Funding: Staff time (operating funds)
20.Ocean Inlet Drive and Shore Drive Stormwater Improvements should be
submitted as a future Utility Department Capital Improvement Project.
Action: Flood conditions have been observed within these rights -of-
way, in part, due to debris in storm drains. Staff recommends purchasing
different types of grates that would help allow for more efficient drainage.
The Utilities Department may consider this area for a future capital
improvement project.
Funding: Capital Improvement Program Funds. Research the possibility
of FEMA grant funds. This mitigation project will be submitted to the Palm
Beach County Unified Local Mitigation Strategy (PBC LMS) Project
Prioritization List (PPL).
21.Implement the Utility Department Lake Boynton Estates Neighborhood Utility
Improvements capital improvement plan (See Appendix N).
Action: Includes potable water mains and stormwater improvements;
primarily swales and some exfiltration. The project is in the final design
stage is planned to be bid by the end of the calendar year (2012) pending
approval of the City, which is being done by procurement in the City
Attorney's office.
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Funding: Capital Improvement Program funds. Research the possibility
of FEMA grant funds. This mitigation project will be submitted to the Palm
Beach County Unified Local Mitigation Strategy (PBC LMS) Project
Prioritization List (PPL).
22.Implement the Utility Department Seacrest Corridor Neighborhood Utility
Improvements capital improvement project (See Appendix N).
Action: Similar to the Lake Boynton Estates project; primarily a water
main project that will include some stormwater improvements such as
swaling and exfiltration. It is planned to be out for bid by December 2012.
Funding: Capital Improvement Program funds. Research the possibility
of FEMA grant funds. This mitigation project will be submitted to the Palm
Beach County Unified Local Mitigation Strategy (PBC LMS) Project
Prioritization List (PPL).
23.Ensure adherence to the City's Emergency Procedures Manual, particularly in
the event of evacuation orders.
Action: A consultant has been hired by the City to update the Emergency
Procedures Manual, which will be completed by the end of October 2012.
Emergency Management Division personnel should review key components
of the procedures before June 1st of each year.
Funding: Staff time (operating funds)
24.Complete the inventory of the City's drainage structures.
Action: This is a requirement of the City's National Pollutant Discharge
Elimination System (NPDES) permit. As part of the 5 -year permit cycle,
20% must be inventories annually. To be completed by the Utility
Department by March 2016.
Funding: Staff time (operating funds)
25.Implement the following Utility Department Capital Improvement Plan
stormwater project: Stormwater Master Plan and Updates - Review the
status of the City's stormwater system and develop plans for its ongoing
maintenance and improvement and ensure compliance with any NPDES
regulations (See Appendix N).
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Action: This is a "high priority" Capital Improvement Project scheduled to
be completed in 2013. This will be a study of the Heart of Boynton area.
Has to go to RFQ.
Funding: Capital Improvement Program funds. Research the possibility
of FEMA grant funds.
26.Encourage designation, protection, and maintenance of wetlands, mangroves
and environmentally sensitive lands..
Action: The Army Corps of Engineers manages wetland ecosystems and
requires permits for certain development activities. The Palm Beach
County Department of Environmental Resources Management has no
permit authority over jurisdictional wetland areas. All wetland areas
claimed as jurisdictional by either the South Florida Water Management
District (SFWMD) or the United States Army Corp of Engineers (ACOE) are
exempt from the County's vegetation removal process; only native upland
vegetation located outside of wetland boundaries are subject to permit.
This recommendation is ongoing and is the responsibility of the City's
Development Department. There are no plans to change the current
approach.
Funding: Staff time (operating funds)
27.Encourage FEMA to update Flood Insurance Rate Maps (FIRM) to include base
flood elevations in all Special Flood Hazard Areas (SFHA).
Action: FEMA is in the process of updating the County's FIRMs at this
time. The Development Department will keep the City updated on the
progress of the mapping.
Funding: Staff time (operating funds)
28.Increase the correction of localized drainage problems so that Level of Service
standards are enhanced.
Action: The Utility Department will continue efforts to maintain, replace,
and upgrade drainage features to minimize or eliminate localized drainage
problems. The Director of the Utility Department shall submit records in
August of each year to the Flood Mitigation Plan Task Force Chair outlining
the previous year's accomplishments. This is reported annually to the
Department of Environmental Protection.
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Funding: Capital Improvement Program funds. Research the possibility
of FEMA grant funds.
29.Require that installation of stormwater management facilities made necessary
by new development is the responsibility of the developer.
Action: This is current policy and will continue as is. This activity is
ongoing as the responsibility of the Utility Department.
Funding: Staff time (operating funds)
30.Identify City parks and unbuildabie lots (as determined by the Development
Department) that could be designated for permanent open space and
encourage such designation where possible.
Action: This responsibility will be a collaboration of the Parks and
Recreation Department, Development Department, and the Public Works
Department.
Funding: Staff time (operating funds)
31.Consider areas for multiple uses that can be used for storage of floodwaters
(retention /detention areas), such as ball fields, public rights of way, parks,
and designated open space in locations that have flooding problems.
Action: This will be a joint responsibility of the Utility and Development
Departments.
Funding: Staff time (operating funds)
32.The Development Department shall evaluate the building /site regulations of
each zoning district and make recommendations for minimum open space
requirements.
Action: The Development Department will be responsible to implement
this activity.
Funding: Staff time (operating funds)
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33.Require new development that requires site plan approval to incorporate
historical drainage patterns in the analysis of the required stormwater
storage.
Action: This is current City policy and the collaboration between the
Utility and Development Departments will continue as is.
Funding: Staff time (operating funds)
34.Encourage developing provisions for stormwater design management
practices in low- impact development.
Action: The Utility and Development Departments have joint
responsibility for this item.
Funding: Staff time (operating funds)
35.Continue the City's maintenance program to clear debris from stormwater
drainage areas.
Action: The Utility Department will assure that this program is
implemented and shall make the records available to the CRS Coordinator
each year. This activity is ongoing and the City will continue its current
approach.
Funding: Staff time (operating funds)
36.As part of the City's NPDES program, continue sediment control to prevent
clogged drainage systems such as street sweeping, curb and gutter cleaning
and planting vegetation on bare ground.
Action: This is current policy and the Public Works Department will
continue the current approach..
Funding: Staff time (operating funds)
37.Prioritize the reduction of repetitive loss properties through various means of
mitigation, update repetitive Toss forms, and strive to remove properties from
the Repetitive Loss List.
Action: This is an ongoing activity that will continue as a top priority of
the City's Development Department, the results of which will be reported
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annually to the Flood Mitigation Task Force. This is current policy and will
continue as is.
Funding: Staff time (operating funds)
38.Include notification of grants, loans, and service availability in all City media
publications, seminars, and websites that pertain to flood mitigation.
Action: This item will become a part of the City's Program for Public
Information (PPI) and will be a joint collaboration between the City
Manager's Office and the Development Department.
Funding: Staff time (operating funds)
39.Provide information to residents, businesses, property owners on the purpose,
importance, and proper maintenance of swales.
Action: This is an ongoing activity by the Utility Department and will
continue the current approach.
Funding: Staff time (operating funds)
40.Work with developers when redeveloping commercial or mixed -use sites
along the Intracoastal Waterway by encouraging that they dedicate the
easternmost portions of land granted as an easement or to be greenways for
public access and use.
When redevelopment is proposed on private properties located along the
Intracoastal Waterway, staff shall collaborate with the developers to
encourage public access along the easternmost portion of the property (e.g.,
development of a greenway, pedestrian path, bikeway, etc.) by the granting
of an easement or other legal means.
Action: This is an ongoing responsibility of the Development Department.
Funding: Staff time (operating funds)
41.Consider City acquisition of repetitive loss and /or adaptation action area
properties along the Intracoastal Waterway.
Action: This responsibility will be a collaboration of the City Manager's
Office, the Development Department and the Legal Department.
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Funding: Staff time (operating funds). Research the possibility of FEMA
and other grant funding.
42.Collaborate with Florida Communities' Trust to assist with funds in acquiring
properties in the Special Flood Hazard Area (SFHA).
Action: This responsibility will be a collaboration of the City Manager's
Office, the Development Department and the Legal Department.
Funding: Staff time (operating funds) and grant trust funds.
43.Collaborate with the Southeast Florida Regional Climate Change Compact as
they make recommendations for land development standards with respect to
low -lying coastal areas.
Action: The City will be asked to pass or approve by Commission
resolution to adopt the Compact where feasible for the Boynton Beach
community, saying we accept the Compact and will look to incorporate the
feasible implementation strategies into the City's land development
regulations and Comprehensive Plan. In early 2013 all of the
municipalities will be presented with a resolution and will be asked by the
County Administrators of Palm Beach, Broward, Miami -Dade and Monroe
Counties to adopt. This will be the responsibility of the City Manager's
Office.
Funding: Staff time (operating funds). Research grant funds for
implementation.
44.Educate citizens about and encourage them to consider the following forms of
retrofitting for areas or buildings with major flooding issues:
• Install backflow valves on sewer systems
• Elevation of structures by piers, posts and columns, and pilings
• Create a secondary water barrier
• Elevate the lowest floor above the 100 -year flood level
• Wet floodproofing (allowing water to enter uninhabited areas of
the structure)
• Dry floodproofing (sealing the structure to prevent flood waters
from entering)
• Levees and floodwalls (constructing a barrier around the
structure to keep out flood waters)
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• Demolition (tearing down the structure and rebuilding with
appropriate floodproofing techniques or relocating the
structure)
• Elevate the main breaker or fuse box
Action: This is an ongoing activity through education and outreach and is
the responsibility of the Development Department.
Funding: Staff time (operating funds)
45.Encourage floodproofing techniques in order to preserve and revitalize
neighborhoods.
Action: This is an ongoing activity through education and outreach and is
the responsibility of the Development Department.
Funding: Staff time (operating funds)
46.Encourage property owners to use qualified hazard mitigation professionals to
inspect building foundations and access damage after flood events.
Action: FEMA, insurance agents, the State National Flood Insurance
Program (NFIP) office and the City's Development Department will provide
contact information
Funding: Staff time (operating funds)
47.Identify, inform, and encourage homeowners' associations to install
littoral /upland buffer plantings around lakes and retention areas.
Action: This will be a responsibility of the Development Department
through education and outreach.
Funding: Staff time (operating funds)
48.Identify privately owned and public natural and beneficial areas in the City
and consider expansion of the City's properties that are designated natural
and beneficial areas.
Action: The Development Department will implement this item.
Recommendations will be presented to the Flood Mitigation Plan Task
Force in its Task Force meetings.
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Funding: Staff time (operating funds)
49.Maintain strong enforcement of South Florida Water Management District and
Lake Worth Drainage District regulations pertaining to floodplain management
Action: The Utility and Development Departments continue this current
policy as is.
Funding: Staff time (operating funds)
50.Encourage individual property owners to pursue percolation- oriented drainage
improvements using best management practices through outreach and
education. Drainage that seeps into the soil, rather than being directed out to
the ocean, provides multiple benefits. Not only does it mitigate flooding, but
it also recharges the aquifer, enhances water quality, and reduces erosion.
Action: The Development Department will include recommendations
pertaining to percolation- oriented drainage in the form of outreach and
education. This activity will be ongoing.
Funding: Staff time (operating funds)
51.Implement strict enforcement of best management practices for reducing
erosion during development activity.
Action: The Development Department will be responsible to implement
this activity. This is current City policy and should continue as is. An
accounting of enforcement of this activity will be included in each annual
evaluation of this Plan.
Funding: Staff time (operating funds)
52.Consider dune restoration programs.
Action: This activity will be the responsibility of the Parks and Recreation
Department.
Funding: Staff time (operating funds). Research the possibility of grant
funds.
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53.Research whether the State will provide free sand and sandbags to residents
prior to impending floods.
Action: This will be the responsibility of the City's Emergency
Management Division. Research the possibility of the State providing
sandbags through the County for distribution at PODs.
Funding: Staff time (Operating funds)
54.Ensure optimal staffing of emergency management personnel to receive and
respond to emergency events.
Action: This practice will continue as in the past, in accordance with
Incident Command System (ICS) standards and ensuring adherence to the
City's Emergency Procedures Manual.
Funding: Staff time (operating funds)
55.Integrate response to flooded homes with appropriate response organizations
(CERT, American Red Cross, faith based organizations and other non - profit
entities).
Action: The Emergency Management Division will contact appropriate
response organizations at least 24 hours prior to anticipated hurricane or
flooding event. During or immediately following the event, contact with
these organizations will be made again to ensure integration of response in
accordance with the City's Emergency Procedures Manual.
Funding: Staff time (operating funds)
56.Identify all critical facilities located within SFHAs and make contingency plans
for each, in the event of flooding.
Action: The City's Fire and Life Safety Division will collaborate with the
Risk Management Department to identify all critical facilities located within
the SFHAs and to make the recommended contingency plans by [date] of
each year. A preliminary report will be presented to the Palm Beach
County Local Mitigation Strategy and the Boynton Beach Flood Mitigation
Task Force.
Funding: Staff time (operating funds)
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57.Continue to ensure that all new public buildings that serve first response and
critical emergency /public needs, including record /data collection and
communication centers /infrastructure, are located outside of flood zones or
floodprone areas.
Action: The Development and Engineering Departments will be
responsible for this activity and will continue the current policy as is.
Funding: Staff time (operating funds)
58.Annually update the list of nursing homes and smaller home care centers
(Type 1 Group Homes) in the City and the priority list of critical facilities.
Action: The City's Fire Department completes this every year. This
procedure will continue as is.
Funding: Staff time (operating funds)
59.Confirm that all nursing homes have an emergency plan.
Action: This is required every year by the City's Fire Department and will
continue the current procedure as is.
Funding: Staff time (operating funds)
60.Keep Special Registry List and share with CERT teams.
Action: This list is maintained by the City's Fire Department and will
continue its current approach.
Funding: Staff time (operating funds)
61.The Stormwater crew will keep a registry of problem areas that requires the
use of vacuum trucks in the event of a flood event, including after regular
business hours.
Action: This is current policy and will continue as is. The Stormwater
Director will coordinate with the Fire and Life Safety Division.
Funding: Staff time (operating funds)
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62.Explore funding opportunities to retrofit critical facilities to be more flood and
wind resistant.
Action: This is the responsibility of the City Manager's Office and is an
ongoing policy that will continue as is.
Funding: Staff time (operating funds)
63.Continue to advertise evacuation routes.
Action: This responsibility of the Emergency Management Department
will continue as is through education and outreach.
Funding: Staff time (operating funds)
64.Post contact information so that citizens know how to contact FEMA post -
flood.
Action: The Emergency Management Department shall ensure that the
literature and announcements included in the City's public information
outreach includes this information. The City will continue this practice as
is.
Funding: Staff time (operating funds)
65.Provide knowledgeable staff to assist citizens, before, during and after a flood
event to help them understand their repair, rebuilding, flooding and
mitigation options.
Action: The Building Official will coordinate this assistance based on staff
availability and prioritized needs. This is a current City procedure and will
continue as is
Funding: Staff time (operating funds)
66.Assure annual distribution of printed copies of the Boynton Beach Hurricane
Survival Guide in multiple languages at City Hall.
Action: This item will be the responsibility of the Emergency Management
Department. Currently the guide is not provided in printed form due to
budget constraints.
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Funding: Research grant availability.
67.Post the Boynton Beach Hurricane Survival Guide and a Zink to the Palm
Beach County Hurricane Survival Guide on the City's website in a location that
is easily accessed by the community. There are no plans to change this
practice.
Action: This is current practice and will continue as is as the
responsibility of the Emergency Management Department.
Funding: Staff time (operating funds)
68.Implement the City's Program for Public Information (PPI), a copy of which
can be found in Appendix P of this Plan.
Action: The Development Department shall be responsible to implement
the City's Program for Public information and to report on its annual
evaluation and revisions by October 1 of each year.
Funding: Staff time (operating funds)
69.Conduct an emergency procedures public outreach campaign (chambers, civic
groups, etc.).
Action: The Emergency Management Department will continue this
activity as is.
Funding: Staff time (operating funds)
70.Continue to work with the City Housing Program to provide education to
homebuyers regarding flood information.
Action: The Development Department will follow up with the Flood
Mitigation Task Force annually on this responsibility by October 1st of each
year.
Funding: Staff time (operating funds)
71.The Community Rating System (CRS) program should sponsor an information
session and invite the insurance industry, Florida League of Cities and other
interested parties to distribute information on potential insurance premium
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discounts, provide information to contractors and homeowners on the risks of
building in hazard -prone areas and mitigation, provide the public with Federal
Emergency Management Agency (FEMA) floodplain maps and develop a list of
techniques for homeowner self- inspection and implementation of mitigation
activities.
Action: The Palm Beach County CRS Users' Group, of which the City of
Boynton Beach is a member, will work with the CRS Program to implement
this activity. Much of this information is distributed at the CRS Users'
Group's Hurricane Expo which in held in June of each year.
Funding: Staff time (operating funds)
72.Research if the realtor community has a hazard disclosure requirement for
deed transfers, leases or other contracts for sale or exchange of property in
flood hazard areas.
Action: This will be the responsibility of the Development Department.
Funding: Staff time (operating funds)
73.The City shall discourage hospitals, congregate living facilities for persons
with special needs, nursing homes and the like from locating within Coastal
High Hazard Area (CHHA) and shall encourage such existing facilities to
relocate to safer locations within the City.
Action: This responsibility will be with the Development Department.
Funding: Staff time (operating funds)
Post Disaster Mitigation Policies and Procedures
During the rushed and stressful recovery phase after a disaster, it is important
that the staff and elected officials have a plan that clearly lays out what should
be done and when it needs to be done
The Emergency Response period includes activities that address the immediate
and short -term effects of an emergency or disaster. Response activities include
immediate actions to save lives, protect property, meet basic human needs, and
begin to restore water, sewer, and other essential services.
The City of Boynton Beach has Interlocal Agreements and Status of Forces
Agreements with communities around it. Calls will go out through Palm Beach
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County for aid from other local governments as well as to State and Federal
emergency agencies.
The City's Emergency Operation Center (EOC) includes the Office of the City of
Boynton Beach Manager, Police Department, Public Works, Fire Rescue
Department, CERT and all other divisions and departments as needed, both
government and civilian. The Boynton Beach EOC is a Category 5 hardened
facility located outside of the flood zone at I -95 and Gateway Avenue.
Post - disaster activities handled by the EOC through the Incident Command
System include, but is not limited to:
• Continually update information pertaining to hurricane and flood warnings,
through a single point of information distribution
• Communication between local government and residents
during the response and short -term recovery phases of a
disaster is the responsibility of the local Public Information
Officer, as described in the CEMP. However, as the
recovery effort transitions from short- to long -term, it is
important that the community avoids any gaps in
communication as responsibilities shift. The involvement
of local government in public outreach efforts is
particularly crucial during long -term redevelopment
activities since the initial surge of media covering the
disaster event will have decreased.
• Posting of damage reports
• Ensuring optimal staffing
• Integrate response to flooded homes with appropriate response
organizations including the American Red Cross, faith based
organizations and other non - profit entities and CERT. The City of
Boynton Beach is fortunate to have one of the best CERT programs in
the County.
There are limited points of distribution (POD) throughout Palm Beach County.
One of these PODs is located in Boynton Beach at the Hester Center. Here ice,
water, tarps, information, etc. can be distributed.
Immediately after a storm, police and fire department personnel will begin
assisting residents. Rescue workers will go into damaged neighborhoods to
search for people who need assistance. This is coordinated with the City's CERT
program. When there is an impending hurricane, the Fire Rescue Department
contacts the CERT members to tell them that they will be on duty. After the
storm has passed, the members disperse to their neighborhoods and begin the
process of giving the Rescue Department feedback about damage to structures,
bridges and roadways and injuries.
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Palm Beach County has a responsibility to determine that the beach areas or
other evacuation areas are safe before reopening them.
Milestones that typically mark the end of the Response Period include the
following:
• Major streets are cleared of debris to allow for restricted travel;
• Re -entry or at least temporary re -entry of the public to assess damage
to their personal property is allowed; and
• Curfews are reduced or lifted (if a minor disaster).
The short -term recovery period encompasses activities such as damage
assessments, public information, the transition from shelters to interim housing,
utility restoration, and debris clearance. Short-term recovery does not include
the redevelopment of the built environment, economic sector, or normal social
networks. Emergency repairs and minor reconstruction, however, will occur
during this phase as well as decisions that may affect Tong -term redevelopment.
Long -term implications are where the Post - Disaster Redevelopment Plan (PDRP)
plays an important role during short term recovery. Many of the decisions that
will shape how Tong -term redevelopment occurs must be made during this period.
Palm Beach County was one of the first jurisdictions in Florida to draft a Post
Disaster Redevelopment Plan (PDRP) in 1996. The County has received national
attention as a leader in this effort. The 1996 PDRP has been totally revamped,
rewritten, updated and expanded to be fully compliant with the federal Disaster
Mitigation Act of 2000, to better adhere to revised state guidelines, and to reflect
"best planning practices ". The scope and content of the plan have been
expanded to address critical issues not addressed in the original document,
especially as they relate to catastrophic disaster such as Hurricane Katrina in the
Gulf and to certain multi - jurisdictional issues. The revised PDRP dated August
2006 is intended to serve as a single reference for guiding pre and post disaster
actions and decisions necessary to facilitate and expedite long -term recovery,
land -use, reconstruction, and economic redevelopment and otherwise create a
more sustainable, disaster resilient community. It has been written for county-
wide multi - jurisdictional use. The revised PDRP has been reviewed and approved
by the County's PDRP Executive Committee and the Florida Department of
Community Affairs. The Palm Beach County Post Disaster Redevelopment Plan
can be viewed on the County's website at
htto://www.pbcgov.comidem/sectionsiplanning/ .
The purpose of the Palm Beach County PDRP is to act as a single reference for
guiding decision - making and action during the difficult disaster recovery period,
as well as detailing actions that can be taken before a disaster strikes to speed
the recovery process. It addresses disaster recovery and redevelopment issues
with long -term implications.
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The PDRP is action - oriented and outlines a countywide implementation approach.
Through an Executive Committee representing county, municipal, non - profit,
private stakeholders and a flexible Working Group structure, actions outlined in
the plan can be implemented as needed regardless of jurisdictional boundaries
and possible staffing fluctuations in a post- disaster environment. Pre - disaster
actions and annual maintenance of the plan allow the PDRP Executive Committee
and Working Groups to actively prepare for a possible disaster.
Post - disaster actions create a strategy for dealing with minor, major, or
catastrophic disasters and are activated by the county's Executive Policy Group in
concert with the PDRP Executive Committee and Recovery Branch Chief. The
format of the plan allows new actions to be easily included and new participants
to become involved immediately through the Working Groups. The success of
the plan relies on the ease of implementation in the aftermath of a disaster and
on the participants' commitment to continually strengthen it by performing "blue
skies" preparations. A disaster event, while tragic, also presents a window of
opportunity for strengthening communities and working toward disaster
resilience. With a strong plan in place, Palm Beach County can take advantage
of those opportunities and more quickly recover from a disaster should it
experience one.
The Palm Beach County Post Disaster Redevelopment Plan is in the process of
being updated with a completion date in mid -2013. The 38 municipalities of
Palm Beach County, including Boynton Beach will be encouraged to adopt the
Palm Beach County PDRP in 2013.
Chapter 163, Part II, F.S. (Florida Statute), requires that each general purpose
local government with jurisdiction over coastal lands include a coastal
management element in its comprehensive plan based on studies, surveys, and
data. It further requires that the coastal element contain a redevelopment
component outlining the principles to be used to eliminate inappropriate and
unsafe development in the coastal areas when opportunities arise. Data and
analysis for the coastal management element must include natural disaster
concerns with several specific post- disaster redevelopment analyses, also
requires that the coastal management element include policies on post- disaster
redevelopment that accomplish the following:
• Distinguish between immediate repair and clean -up actions needed to
protect public health and safety and long -term repair and
redevelopment activities;
• Address the removal, relocation, or structural modification of damaged
infrastructure as determined appropriate by the local government but
consistent with Federal funding provisions and unsafe structures;
• Limit redevelopment in areas of repeated damage; and
• Incorporate the recommendations of interagency hazard mitigation
reports, as deemed appropriate by the local government, into the local
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government's comprehensive plan when it is revised during the
evaluation and appraisal process.
The City of Boynton Beach Comprehensive Plan meets the requirements of the
Florida Statutes with the following excerpts from the Comp Plan:
Objective 7.13 To provide for the ongoing development of the
coastal area in a manner which will reduce the exposure of human
life and public and private property to natural hazards by
developing a Post- Disaster Redevelopment Plan.
Policy 7.13.1 The City shall continue to utilize the Community
Redevelopment Area Plans, the Future Land Use Map, and
recommendations from the adopted redevelopment planning studies
as basis for a post disaster redevelopment plan for establishing
construction criteria and siting requirements for use in
redevelopment of existing developed properties. This effort would
include a review of the Coastal Construction Building Code, the
Current Flood Protection Ordinance, the Future Land Use Map,
Community Redevelopment Agency plans, and other pertinent
recommendations from the "Federal Highway Corridor Community
Redevelopment Plan" and include criteria to distinguish between
immediate repair and long -term redevelopment.
Policy 7.13.2 The City shall continue to adopt and maintain
procedures in capital improvement funding that prohibit the
construction or installation of public infrastructure in coastal high -
hazard areas or flood prone areas unless necessary to correct
current deficiencies, to relocate or replace infrastructure, or to serve
a clearly demonstrated public interest.
Policy 7.13.3 The City shall continually support redevelopment
subsequent to a major storm occurrence consistent with the uses,
densities and construction practices as outlined in the Coastal
Management Element, the Post - Disaster Redevelopment Plan, when
available, or other coastal related regulatory documents in the
event that a specific Post - Disaster Redevelopment Plan is not
created.
Policy 7.13.4 The City shall modify the Land Development
Regulations to provide for general hazard mitigation, include
recommendations of the Palm Beach County Hazard Mitigation
Annex, as applicable, regulate beach and dune alterations,
stormwater management, sanitary sewer and septic tanks, and land
use to reduce the exposure of natural hazards to property and
human life.
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Policy 7.13.5 The City shall include in the Post - Disaster
Redevelopment Plan the identification of areas requiring
redevelopment, the elimination of unsafe conditions and
inappropriate uses. Reference should be made to the Future Land
Use Map, Community Redevelopment Agency plans, and to other
pertinent recommendations from the "Federal Highway Corridor
Community Redevelopment Plan" planning study.
Objective 7.14 By 2013, the City shall minimize at -risk population
concentrations in the coastal high- hazard area.
Policy 7.14.1 The City shall implement by 2013, the post- disaster
redevelopment plan and procedures for establishing construction
and development criteria in the coastal high- hazard area.
Policy 7.14.2 The City shall prohibit by 2018 redevelopment of
existing dwelling units located in the coastal high- hazard area
unless an engineering study supports that the redevelopment can
occur in a safe manner when considering building construction,
design, siting and future storm events.
Policy 7.14.3 By 2018, the City, in a joint City- County effort, shall
establish a public /private planning initiative to guide post- disaster
activities.
Policy 7.14.4 By 2018, the City shall establish a public /private
planning initiative that obtains assistance with possibly
overwhelming demands on public service during the post- disaster
redevelopment activities.
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Implement, Evaluate and Revise - Section Ten
As implementation of the City of Boynton Beach Flood Mitigation Plan
proceeds, to assure that the plan remains current and relevant, it is
important that it be periodically updated. There may be changes in the goals
and objectives of the plan. Focus may change to parts of the Special Flood
Hazard Area newly damaged by flooding. New FIRMs may be in effect. In an
effort to ensure that there is a continuing and responsive planning process,
the following procedures are included in the City of Boynton Beach Flood
Mitigation Plan (FMP):
Annual Evaluation
The Flood Mitigation Plan Task Force responsible for the development of this
plan or a successor task force similar in membership that was created to
replace the original task force shall meet quarterly. Because the Task Force
is composed of both staff members as well as community stakeholders, the
annual evaluation will include community input. Furthermore, the Task Force
meeting will be publicly noticed through the City's website, Facebook, Twitter
and other media outlets, encouraging the participation of the whole
community. The meetings will take place in late January, late April, early
July, and early September. The documentation of these meetings, including
advertisements inviting the public to each meeting, minutes, and sign -in
sheets will be collected by the Task Force Chair for submission to the CRS
program. The FMP Task Force Chair is responsible for overseeing and
monitoring implementation of the plan and may call meetings or contact
members more often as necessary.
Prior to the July meeting, the Task Force Chair is responsible to prepare a
draft FMP Evaluation Report (progress report) that will be presented at the
July meeting. The Task Force will review and discuss the report, after which
it may be revised before the Task Force adopts it. The report shall include:
❑ A description of how the evaluation report was prepared and
how it will be submitted to the Commission, released to the
media, and made available to the public.
• The Task Force meeting notices and evaluation
report can be made available to the public by a
notice on the City website's homepage, on E -news,
BBTV, bulletin boards in HOA offices, etc.
❑ How the reader can obtain a copy of the original plan.
❑ A discussion of why any objectives were not reached or why
implementation is behind schedule.
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❑ A review of each action item in the action plan, including a
statement on how much was accomplished during the previous
year, or why implementation is behind schedule.
❑ Recommendations for new projects or revised action items.
Such recommendations shall be subject to approval by the City
Commission as amendments to the adopted plan.
Following adoption of the annual FMP Evaluation Report by the task force, it
will be submitted to the City Commission, released to the media, a copy sent
to the State NFIP Coordinator and made available to the public for comment.
The CRS Coordinator must submit a copy of the annual evaluation report with
the City's CRS recertification by October 1st of each year.
The Director of Development will assure that the Flood Mitigation Plan Task
Force continues to be comprised of high -level staff that will likely be
responsible for implementing the plan, and at a minimum, an equal number
of members of the public as stakeholders. This was the makeup of the FMP
Task Force that developed the original City of Boynton Beach Flood Mitigation
Plan in 2012.
Five - Year Update
An update to the FMP must be prepared every five years. The first update
will be prepared five years after adoption of the original FMP.
As with the annual evaluations, the Task Force chairperson will be
responsible to conduct the five -year update. The process for the update will
commence no less than 6 months prior to the five -year anniversary date.
The Task Force chairperson will have the descriptive elements of the plan
updated in accordance with current information, studies, etc. The Task Force
will meet no less than three times. The first meeting will entail a review of
the updated flood mitigation plan. The second meeting will examine the
Action Plan, evaluating those activities that have been successfully completed
and discussing the reasons why any activities may not have been completed.
This meeting will also begin the process of identifying new or revised Action
Plan activities. The third meeting will complete the identification of new or
revised activities for the Action Plan and prioritize all of the activities.
Following the preliminary adoption by the Task Force, the plan will be
presented to the community for its input and sent by email to stakeholders
and appropriate agencies both within the community and outside the
community.
The 5 -year update must include the following steps:
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❑ Because the original planning process included a task force for which
points were received in the CRS program, then in order to keep those
CRS credit points the update must be conducted by a task force.
❑ Because the original planning process received CRS credit points for a
final community meeting to comment on the draft Plan, then in order
to keep those points there must be a public meeting to comment on
the draft Update.
• The public meeting must be advertised in the local newspaper
as well as the City's website, HOA bulletin boards, BBTV, social
media sites, etc.
❑ The Update must include a review of new studies, reports and
technical information and of the community's needs, goals and plans
for the City that have been published since the plan was originally
prepared.
❑ The hazard and problem assessments must be reviewed and brought
up to date. The assessments must account for:
• New floodplain or hazard mapping
• Annexation of floodprone areas
• Additional repetitive loss properties
• Increased development in the floodplain or watershed
• New flood control projects
• Lack of maintenance of flood control projects
• Major floods or other disasters that occurred since the plan was
adopted
• Any other change in flooding conditions and /or development
exposed to flooding
❑ The Action Plan must be revised to account for projects that have been
completed, dropped, or changed and for changes in the hazard and
problem assessments as appropriate.
❑ The Update must be adopted by the City Commission.
❑ The updated Flood Mitigation Plan must be submitted to the State
Hazard Mitigation Officer for initial review and coordination every five
years. The State will then send the plan to the Region IV FEMA office
for formal review and approval.
❑ The updated Flood Mitigation Plan must be submitted to the ISO /CRS
Specialist with the City's CRS recertification package every five years
by October 1s The five -year plan update will be scored by the
Community Rating System according to the Coordinator's Manual
currently in effect at that time, not the version used when the original
plan was scored.
CRS Max Consultants, no July 2013
Section Ten Page ; o{ 4
(.:10 of Bo }nton Beach F lood Mitigation Plan
Integration into Other Plans and Documents
The Building Official, under the direction of the Director of Development will
ensure that the Flood Mitigation Plan Task Force Chair and CRS Coordinator
interface with appropriate governmental and nongovernmental agencies and
offices to ensure that the Flood Mitigation goals, objectives, and priorities are
consistent with and cross - referenced with those articulated in other existing
plans, such as the City of Boynton Beach Comprehensive Plan, the
Comprehensive Emergency Management Plan, the Palm Beach County
Unified Local Mitigation Strategy, and the Utility Department Capital
Improvement Plan. The make -up of the original Flood Mitigation Task Force
included, as the Chairperson from the City of Boynton Beach, the Planner II,
the Fire Marshall from the Fire and Life Safety Administration, and the Hazard
Analysis Chairperson and LMS Steering Committee representative from the
City and other pertinent staff.
In addition, the Task Force Chairperson will seek opportunities, including in
the quarterly Task Force meetings and Department of Development Staff
meetings, to communicate the importance of:
• updating plans, policies, regulations and other directives to include
flood hazard mitigation priorities
• encouraging the adoption of mitigation priorities within capital and
operational budgets and grant applications
• sharing information on grant funding opportunities
• offering guidance for carrying out mitigation actions
• exploring opportunities for collaborative mitigation projects and
initiatives among City departments.
CRS Max Consultants, Inc July 2013
Section Ten Page 4 of 4
Cit o1 Boynton Beach Flood Mittgatton Plan
Adoption of the Plan - Section Eleven
The City of Boynton Beach City Commission adopted the Flood Mitigation Plan
on July 16, 2013 renewing its dedication to the safety and well -being of the
citizens and businesses of Boynton Beach. Exhibit 7 includes a copy of the
resolution to adopt the Plan.
CRS Max Consultants, Inc July 2013
Section Elever Page 1 of 1