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RESOLUTION NO. R04- I I~ ~
THE AMOUNT
SYSTEM-WIDE
DISTRIBUTION
CONDUCTING
SUPPORT OF
A RESOLUTION OF THE CITY OF BOYNTON BEACH,
FLORIDA, AUTHORIZING EXECUTION OF TASK
ORDER NO. U04-03-02 TO BROWN AND CAI.DWELl. IN
OF $376,000, FOR UPDATING THE
WATER TRANSMISSION AND
COMPUTER MODEL AND
A WATER SYSTEM ANALYSIS IN
THE CITY'S COMPREHENISVE
UTILITIES PLANNING PROCESS; AND PROVIDING AN
EFFECTIVE DATE.
WHEREAS, the City owns and operates a water transmission and distribution
system that serves over 90,000 people within its service area, and rapid development and
redevelopment of properties within the Utility's services area have resulted in an increased
demand for reliable delivery of potable water, in larger quantities; and
WHEREAS, staff has determined that this situation has also resulted in a need to
deliver improved fire flows to areas where multi-story buildings are planned or currently
under construction, which concerns have made it necessary for the Utilities Department to
re-evaluate its infrastructure and its ability to meet its commitments to its customers, now
and in the future; and
WHEREAS, the City Commission, upon staff's recommendation, has deemed it
appropriate and in the best interests of the public to approve Task Order No.U04-03-02 to
Brown and Caldwell to provide for updating the system-wide water transmission and
distribution computer model and conducting a water system analysis in support of the City's
comprehensive utilities planning process.
NOW, THEREFORE, BE IT RESOLVED BY THE CITY COMMISSION OF
THE CITY OF BOYNTON BEACH, FLORIDA, THAT:
S:\CA\RESOLa. greements\Task - Change Orders\Brown and Caldwell - U04-03-02.doc
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Section 1. The foregoing "Whereas" clauses are hereby ratified and confirmed
as being true and correct and are hereby made a specific part of this Resolution upon
adoption hereof.
Section 2. The City Commission of the City of Boynton Beach, Florida does
hereby authorize and direct the approval and execution of Task Order No. U04-03-02, in the
amount of $376,000 to Brown and Caldwell, for updating the system-wide water
transmission and distribution computer model and conducting a water system analysis in
support of the City's comprehensive utilities planning process.
Section 3. This Resolution shall become effective immediately upon passage.
PASSED AND ADOPTED this 7 day of ,~l~egl[~,_e-, 2004. I -
ATTEST:
CITY OF BOYNTON BEACH, FLORIDA
l}~or ' /' /" -
~...../. ....~:'.,;'z/' --" Z4'/ '"'?
' Uommis~/io0_er ~..~r ~.~
S:\CA\RESO~Agreements\Task - Change Orders\Brown and Caldwell - U04-03-02.doc
Task Order No. U04-03-02-
Water Distribution System Analysis
And Hydraulic Model Update
For the City of Boynton Beach
A. BACKGROUND
As part of the development of the City of Boynton Beach (City) Comprehensive Plan in
the late 1980's, the City's consultants developed a hydraulic analysis of the City's water
distribution system. The analysis of the system was documented in the January 1989
report titled: "City of Boynton Beach, Florida, Comprehensive Plan, Sanitary Sewer
Drainage, Potable Water, Natural Groundwater Aquifer Recharge and Solid Waste
Element." Since the completion of the January 1989 report and a subsequent, limited
("un-calibrated") model upgrade by Hartman & Associates, the City has made (or is
planning) major improvements to the water supply, treatment, storage, and distribution
systems, without the benefit of a current model.
In addition to the above system improvements, the operation of the system has been
modified to not only shift the primary supply source for the system to the West WTP, but
also to respond to South Florida Water Management District (SFWMD) policies related
to the severe drought (Summer 2000) in the region. Based upon the SFWMD policies,
the Boynton Beach Utilities Department has been operating the system at a reduced
delivery pressure of 45 psi during water restrictions. This dblivery pressure has
dramatically reduced the usable storage in the concrete elevated storage tank. (The
limitation on delivery pressure causes a reduction in the stored supply in the City's
elevated storage tank.)
The Utilities Department is seeking assistance from one of the existing pre-approved
general engineering consultants, Brown and Caldwell (B&C), to upgrade the existing
model to reflect the changes in the system related to the storage tank locations and
capacity, pump stations and storage tanks, additions to the transmission main system, and
the West WTP. The Department is also requesting that the disaggregation of the peak
demands be analyzed to verify that the demand projections in the January 1989 and
updated 2002 model reflect the current peak demands on the system. The flow
disaggregation will also be evaluated to adjust the demands on the system and to adjust
the demands of critical nodes in the model, based upon changes in the land use plan for
the City. It is understood that characteristics of the downtown areas of the City could
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potentially be significantly modified to increase water demands if a change in allowable
building height is approved.
B. SCOPE OF SERVICES
General:
Brown and Caldwell (B&C) has generated a specific Scope of Services to update and
revise the model developed for the 1989 Comprehensive Plan. Based upon detailed
discussions with Utilities Department staff, the goal is to provide the City with an
updated model that can be used to determine system improvements to address the
following operational and service requirements:
1. Changes in the land use zoning and developed densities and the potential
increase in the current building height requirement.
2. The use of interconnects with adjacent utilities to meet emergency and/or fire
flow requirements.
3. Movement of water supply across the entire network.
4. Delivery of water service primarily from the Western RO WTP to the Eastern
areas.
5. Reduction in the delivery pressure at the water treatment plants to 45 psi.
6. Present a calibrated, usable model to the City to model fire flow capacities,
pump sizing and determination of which projects will provide the greatest
benefits.
Below is the Scope of Services for the update of the 1989 water transmission/distribution
system analysis.
Task 1: Data-gathering and Review
Under this Sub-task, B&C staff will gather and catalog existing documentation provided
by the City and a copy of the latest modeling software will be procured for use in analysis
of the system. Information made available by the City's Utilities Department will be
reviewed and organized for discussion as an agenda item during the Project Kick-off
Meeting.
Page 2 of 9
Task 2: Kick-off Meeting with City Staff
Prepare for and conduct a Project Kick-off Meeting with Utilities Department Staff to
review the objectives of the model upgrade and achieve consensus on the product of this
effort. Prior to the meeting, B&C will receive a working electronic copy of the 2002
model to review and will determine the critical issues regarding the model, as well as the
other City-furnished items (see Section IV, page 6 of 7, herein) that will need to be
reviewed during the Kick-off Meeting.
Based on B&C's understanding of the City's objectives for the revised model, B&C will
review the skeleton system. The skeleton system will be based upon the currently
available model. Insignificant or substandard piping that can be obviously identified
from a review of the existing AutoCAD water system files will be removed from the
model for purposes of this analysis. Similarly, known major pipeline upgrades and
additions will be incorporated into the model.
Following the meeting, the consultant will summarize the discussions and will distribute
a copy of the memorandum to all interested parties. This document will constitute the
"deliverable" for Task I.
Task 3: Model Conversion
Based on the best available information, the current model utilized Haested Methods'
WaterCADD version 4.5 hydraulic modeling software system analysis. The existing
distribution/transmission system is available in digital format. However, the distribution
and transmission system is stored on one layer in AutoCAD. B&C will develop a
comprehensive layout of the existing system placing individual water main sizes on a
separate AutoCAD layers. By segregating the pipe sizes by layer, B&C will be able to
digitally transfer the pipe locations and sizes to the WaterCADD model, while providing
the City with a more flexible database for the existing, centralized GIS database for all
elements of the City's Public Utilities and Water Works Systems, as well as being
utilized for other planning and mapping purposes.
Task 4: Disag~regation of Water Demands
Utilizing available GIS maps, B&C will compare land use and zoning requirements for
the City in 1989 to the current requirements. Based upon this GIS map analysis, B&C
will identify areas where the density of development has materially changed. In addition
to the land use analysis, B&C will compare the TAZ zone population projections, which
were used in the 1989 report, with the projections from the 2000 census projections. In
addition, the consultant will compare the per unit usage such as per capita for single
family residential customers, per student/seat for institutional usage and per acre/sq.
for commercial/industrial flows in the 1989 model with the past five (5) - year historical
patterns observed by the City. Based upon the changes in the documented flows and
Page 3 of 9
assumptions in the 2002 model, B&C will make appropriate adjustments in the demands
to be utilized in the model for purposes of this analysis.
Task 5: Model Comparison
Comparison of the model will be performed. This will include collecting five (5) years of
operational data from the City on plant pumpage, water levels in the storage tanks and
City-monitored system pressures to determine the model's level of calibrated. B&C will
also utilize the recently completed Insurance Services Office (ISO) fire flow data to
determine whether the model is properly calibrated, determine whether system valves are
in the proper operating position and estimate pipe friction factors. In conjunction with
the ISO data, review the friction coefficients utilized in the 1989 and 2002 models and
will use best engineering judgment in establishing friction coefficients for both existing
and ne~v mains based upon pipe material, age of the pipe and any projected change in the
pipe condition over the evaluation period used in the analysis.
B&C will evaluate system improvements based upon the following future conditions:
1) near term demands (1-5 years);
2) projected demands in 2010, 2015 and 2020;
3) projected demands at the end of the twenty (20) year planning horizon (2025); and
4) projected demands under build-out conditions.
Task 6: Interim Review Meeting
Upon completion of Tasks 1 through 4, B&C will prepare a Technical Memorandum
(deliverable) outlining the analysis and conversion of the model to WaterCADD. The
Technical Memorandum will also summarize the changes in demands that have been
made to the original model and the results of the initial calibration analysis for the
WaterCADD model. Once the City has reviewed the technical memorandum, B&C will
schedule a time to meet with the City to review the findings of the initial analysis.
At the meeting, B&C will establish, with the City's input, the specific demand conditions
that the City will want analyzed. These demand scenarios will include: 1) variations in
the supply source between the East and West WTPs, 2) fire flow demands at critical
points in the system, 3) demands for new groxvth areas, 4) evaluation of the capacity of
existing and future interconnects with adjoining utilities, 5) varying WTP delivery
pressures, 6) drought vs. normal usage conditions with an evaluation of system
operational strategies to meet the severe drought conditions, 7) additional storage and/or
re-pump stations to meet critical conditions, 8) and evaluation of the reduction in water
demands if the City implements a reuse distribution system to offset existing and future
irrigation demands, 9) a sensitivity analysis on the impact of high rise development in
identified areas of the City.
Page 4 of 9
Task 7: Field Calibration
Based upon the findings in Tasks 1 through 5, B&C will perform a field calibration
analysis of the revised hydraulic model at three selected field data-gathering events.
Each event will cover a 24-hour period. For example, one event period may occur during
peak demand and another during low demand conditions.
For the instantaneous analysis, flows from selected fire hydrants will be measured along
with the existing system pressures in the vicinity of each test hydrant. The status of
major inputs to the water system from the two water plants, re-pump stations and the
elevated storage tanks ~vill also be monitored. In addition to fire hydrant flow tests, B&C
will evaluate the need to install twenty-four (24) hour pressure recorders at selected
points in the system to monitor changes in the distribution/transmission system pressures
over and extended period. B&C will utilize up to ten (10) continuous recorders to
evaluate changes in system pressures over extended periods.
After the field calibration is performed, B&C will make adjustments in one or more of
the following factors to adjust the model to reflect the field observed conditions:
1) friction coefficient for selected pipe segments;
2) operating position of line valves;
3) peak hourly to average daily flow demand ratios and/or;
4) Allocations of demands to critical model node points.
Task 8: Detailed Analysis
Once the City and B&C have determined that the revised model is accurately reflecting
the existing system, under critical operational conditions, B&C will analyze selected flow
scenarios to meet future growth and system requirements. The selection of scenarios for
the model will be based upon discussions with the City, after B&C has presented
recommended model scenarios to the City, as discussed in Tasks 4 and 5. The model
scenarios will be based upon steady state conditions, using selected water treatment plant
and system operating conditions. These conditions will include: level in the elevated
storage tank and pump capacities at selected delivery pressures, diurnal demand patterns
and fire flow demands for selected alternatives. The modeled scenarios will be based
upon the growth projections for each five (5)-year increment over the twenty (20)-year
planning horizon. Build-out conditions will also be evaluated. The five (5)-year
increments have been selected to evaluate phased improvements to the water system and
to meet the requirements under build-out conditions.
Page 5 of 9
Task 9: Report of Findings
B&C will summarize the findings of the hydraulic model analysis in a bound report. The
report will present the recommended improvements to the existing system to meet future
growth and land use plans for the City. Planning level construction cost estimates and
project a schedule will be prepared for the system improvements. These cost estimates
will consider constructability issues related to the pipeline corridors, as well as major
roadway and canal crossing issues related to the pipeline corridors. The report will
include consolidated maps, which depict the existing system and the phased,
recommended improvements, including system improvements required to meet build-out
conditions. The capital cost requirements will be summarized for each five (5) year
period and the build-out condition.
Upon receipt of the City's review comments for the draft report, B&C will meet with
City Staff to discuss the draft report and address specific comments by the City. After
the meeting, B&C will finalize and submit a Final Report. B&C will provide the city
with the final document and digital file of the model, and hard copy maps, which depict
the recommended improvements to the system to meet the future conditions.
C. ASSUMPTIONS
The projected level of effort and schedule for the hydraulic analysis has been based upon
the City providing the following information within two weeks from Notice to Proceed
for the project:
Electronic copy of model and model databases with current use licenses or
other required permissions.
Copy of the 1989 hydraulic model available information and 2002
hydraulic study.
Historical system operational data including water plant flow records, tank
levels, booster pump station flow/pressure readings, fire flow test results
and pressure readings from remote locations in the system.
Electronic files of the City's 2002 and current land use zoning maps.
AutoCAD files for the existing water transmission/distribution system.
D. CONTRACT REFERENCE
This task order shall be performed under the terms and conditions described within the
Agreement for General Engineering Consulting Services dated November 18, 2003
between the City of Boynton Beach and Brown and Caldwell.
Page 6 of 9
E. ADDITIONAL SERVICES
The folloxving are examples of some specific Additional Services items that may be
required, but are not included within this Task Order. Generally, a condition contrary to
the work description in Section B or assumptions of Section C (upon which the task order
fee is established) is considered an Additional Service item. Examples include:
Gathering of additional information, beyond that available from City Staff.
Development of a new water system computer model due to lack of, or
inadequacy of an existing model.
Field verification of existing utilities.
Development of property descriptions of easements and rights-of-way.
These and other services may be provided, if desired by the City, under a separate task
order or by an amendment to this task order. Services performed will be on an as-
directed basis, in accordance with a written Notice to Proceed from the City.
OBLIGATIONS OF THE CITY
The City shall provide B&C, in a timely manner, record data and information
related to the water system, as necessary for the performance of services
specified herein.
The City shall review all draft deliverables submitted by B&C and shall
provide review comments within fifteen (15) calendar days.
G. COMPENSATION
Compensation for services rendered will be a Lump Sum Fee of $376~000. Brown and
Caldwell will invoice the City monthly, based on percent complete, as established for
each Task, below. The budget for this Task Order is based on the approved rate schedule
established under our Professional Services Agreement, dated November 18, 2003.
Individual task budgets have been provided to reflect the level of effort required for each
task and corresponding invoicing percentages.
COST SUMMARY:
Sub-Task No. & Name
Estimated
Sub-Task Fee (and % value)
1 - Data-gathering... $21,000
2 - Kick-off Meeting $30,000
3 - Model Conversion $23,000
4 - Disaggregation of Water $24,000
5 - Model Comparison $36,000
(6%)
(8%)
(6%)
(6%)
00%)
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6 - Interim Review Meeting
7 - Field Calibration
8 - Detailed Analysis
9 - Report
Total Lump Sum Fee:
$36,000
$54,OO0
$89,000
$63,000
$376,000
(9%)
(14%)
(24%)
(17%)
H. PROJECT SCHEDULE
The project schedule
Notice to Proceed.)
Sub-Task
for each Sub-task is presented below. (Month "0" -- receipt of
Start Month End Month
1 - Data-gathering... 1
2 - Kick-off Meeting 1
3 - Model Conversion 1
4 - Disaggregation of Demands 1
5 - Model Comparison 2
6 - Interim Review Meeting 3
7 - Field Calibration 3
8 - Detailed Analysis 5
9 - Report 7
1
1
2
2
3
4
6
7
9
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APPROVED BY:
CITY OF BOYNTON BEACH, FLORIDA
Kurt Bressner
City Manager
Dated this ~ day of
,2004
SUBMITTED BY:
BROWN AND CALDWELL
By:
Dated this/'~ day of
Phil Feeney, P.E.
Senior Vice President / Regional Manager
,2004
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