APPLICATION
WETLAND MITIGATION PLAN
MONTEREY BAY, WESTBROOKE HOMES
The Monterey Bay project is permitted under ACOE permit 200004269 (IP-BP) and
SFWMD Permit 50-05137-P. For unavoidable impacts to 8.46 acres oflow quality
melaleuca infested wetlands, the applicant will provide 5.52-acres of on-site mitigation.
Mitigation will be comprised of the enhancement of 1.44 acres of existing melaleuca
wetland habitat and the creation of 4.08 acres from uplands and an existing lake. When
completed, the mitigation area will provide habitat with a higher functional value and
more diversity than is otherwise available in the existing wetlands.
Construction will begin with the isolation of the mitigation area with silt curtains and/or
hay bales, this will be followed by the removal ofthe Melaleuca and all other invasive
exotic and nuisance vegetation. All vegetation removed as a part of this mitigation
project will be disposed of in an approved manner.
Construction will employ scraping and earthwork to provide suitable wetland elevations
and substrate. The marsh area will be over-excavated to allow a minimum of l' of
backfill with suitable wetland soils. When the earthwork is completed the elevations
within the marsh will vary between 6.6' to 7.6'NGVD. The control elevation is
identified as 8.6' NGVD.
A 25' wide forested buffer will encircle the marsh habitat. The buffer planting will start
at the control elevation and go up to 14.3' NGVD.
Wetland mitigation area earthwork will continue for approximately six (6) months
wherein the ground elevations will be lowered as necessary to the proposed wetland
mitigation elevations. All soils will be used onsite or disposed of in an approved wetland
area. Perimeter berms will be held at a maximum elevation of 14.3. A control structure
will be installed in the southeastern comer ofthe mitigation area.
Following completion of the scraping and earthwork, an as-built survey of the area will
be generated and reviewed for consistency to the permitted mitigation plan. Upon
approval by the jurisdictional agencies of the as-built conditions--confirming that the
wetland area is the appropriate elevation, configuration and acreage pursuant to the
issued permit--the mitigation area will be planted according to the Wetland Mitigation
Planting Plan (See attached plan). The planting chart identifies the quantities, plant
spacing and recommended elevation for plant materials that will be installed in the
mitigation area.
Signage identifying the area as a" WETLAND MITIGATION AREA, Protected for
Environmental and Conservation Use Only" will be placed at 250' intervals along the
limits of the mitigation area.
Within one month of completion of the installation of the plant materials, a base-line
Time Zero report will be submitted to the jurisdictional agencies. Upon acceptance of the
Time Zero report by the jurisdictional agencies, quarterly monitoring will be conducted
for a period of five years. If the mitigation area is determined not to be in compliance and
the Time Zero report is not accepted as satisfactory by the jurisdictional agencies, the
problems that are identified by the permitting agencies as not in compliance will be
corrected and a new Time Zero report will by submitted. Quarterly monitoring will not
occur until the Time Zero report is accepted by the permitting agencies having
jurisdiction.
Routine maintenance to remove and eradicate nuisance and invasive exotic vegetation
will be ongoing from the start of construction throughout the entire monitoring phase and
shall be conducted in perpetuity to ensure the mitigation area remain free of nuisance and
invasive species.
MITIGATION AREA MONITORING AND MAINTENANCE PLAN
MONTEREY BAY, WESTBROOKE HOMES
A monitoring program will be implemented upon completion of the construction and the
installation of the plant materials within the mitigation area. The goal ofthe monitoring
program is to ensure the establishment and long-term viability of the designed habitat
functions. At least 80% coverage of desirable plant species by year two, maintained at
least at this level for the next three years is the minimal accepted survival level to
consider the site as successful.
Routine maintenance to remove and eradicate nuisance and invasive exotic vegetation
will be ongoing from the onset of construction throughout the entire monitoring phase
and shall be conducted in perpetuity to ensure the mitigation area remain free of nuisance
and invasive vegetation. Maintenance will involve physical and chemical eradication
methods. Nuisance and invasive exotics are considered to be, but not limited to, those
species identified by the Florida Exotic Pest Plant Council as invasive exotics. The goal
of the maintenance program is to ensure the successful eradication of invasive exotic
plant species that would otherwise disrupt the success of the designed wetland habitat
functions. The exotic and other nuisance plant species shall not exceed more than 5%
coverage between maintenance activities.
Upon completion of the excavation and re-grading, and upon approval by the
jurisdictional agencies of the as-built conditions, the installation of the plant materials
will begin. Within one month of completion of the installation ofthe plant materials a
base-line Time Zero report will be completed and submitted to the jurisdictional
agencies. The time zero report will provide a quantified inventory of all species planted
within the mitigation area and will document the habitats and the acreage of each. The
report will quantify the degree of invasive material present on the site and conunent on
the health of the planted material. The report will include a site plan identifying the
location of the established transects, photo-stations and staff gauge. Staff gage readings
will be reported and site photographs will be included.
Upon acceptance of the Time Zero report by the jurisdictional agencies, quarterly
monitoring will be conducted for a period of five years. Quarterly reports will reflect data
gathered from established transects which represent typical habitat sections. Transect data
will include an inventory of species present and percent coverage of desirable species
represented, and exotic species. The quarterly reports will include an inventory of
recruited species, the wildlife observed on-site and photographs taken from the
established photo-stations. Comments will be provided on the survival and overall health
and growth of the planted species and overall success and viability of the mitigation area.
Each report will quantify the degree of invasive material present and discuss
reconunended or implemented remedial actions as or if needed.
A forested transect will be established as well as two (2) transects within the herbaceous
habitat. Each transect will be 250' feet in length.
Along the herbaceous habitat transects, replicate 1m2 samples will be randomly selected
for each monitoring event by blind throwing of a quadrat along each transect line. No
less than 6 samples will be taken per each transect line. Sampling locations, along each
herbaceous transect will be randomly selected for each monitoring event. The percent
coverage of the desirable herbaceous species will be visually estimated and recorded.
The percent coverage ofthe undesirable species will also be visually estimated and
recorded.
The transect within the forested vegetated buffer will be a 'belt transect' 20 feet in width.
Within 10' of each side of the transect line all trees and shrubs will be identified and
quantified. Each tree will be measured for canopy width, height, and DBH with the mean
height, canopy spread, DBH and percent cover for each tree species reported. Within the
belt transect the herbaceous component will also be sampled by randomly selected, blind
throwing of the quadrat. The percent coverage of the desirable herbaceous species will be
visually estimated and recorded along with the percent coverage of the undesirable
herbaceous species within each quadrat. No less than 6 random quadrat samples will be
taken per each monitoring event within the belt transect.
All monitoring event data will be provided to the maintenance contractor to assist in the
effective control and eradication ofnuisahce and invasive plant species.
LAKE SHELF MONITORING AND MAINTENANCE PLAN
MONTEREY BAY, WESTBROOKE HOMES
To filter run-off materials, facilitate nutrient uptake, stabilize the shoreline, provide
functional wildlife habitat and enhance the overall health of the lake, twelve (12) lakeside
planting beds comprised of 13,045 square feet of planting area covering 1,260 linear feet of
shoreline will be install within the proposed lake in the Monterey Bay development project.
A monitoring program will be implemented upon completion of the construction and the
installation of the plant materials within and along the lake edge. The goal of the
monitoring program is to ensure the establishment and long-term viability of the designed
habitat functions; 100% survival in the upland portion of the edge planting and 80%
survival on the aquatic shelves is the minimal accepted survival level of planted material.
Routine maintenance to remove and eradicate nuisance and invasive exotic vegetation
will be ongoing from the onset of construction throughout the entire monitoring phase
and shall be conducted in perpetuity to ensure the lakes shelves remain free of nuisance
and invasive vegetation. Maintenance will involve physical and chemical eradication
methods. Nuisance and invasive exotics are considered to be, but not limited to, those
species identified by the Florida Exotic Pest Plant Council as invasive exotics. The goal
ofthe maintenance program is to ensure the successful eradication of invasive exotic
plant species that would otherwise disrupt the success of the designed wetland habitat
functions. The defined lake edge p1antings must have less that 1 % invasive coverage.
Additional measures of success are wildlife utilization and dissolved oxygen content in
the lake.
Upon completion of the creation of the lake by excavation and re-grading, installation of
the plant materials will begin. The shelves will be planted according to the permitted
Planting Plan; which identifies the species, quantities, size, spacing and recommended
elevation for plant materials. The Planting Plan will also be incorporated into the
compliance monitoring reports.
Within one month of completion of the installation ofthe plant materials within the
planting beds, the first, quarterly monitoring report will be completed and submitted to
the City of Boynton Beach, Planning and Zoning Division. Monitoring will be conducted
for no less than two years. At the end of the two year monitoring period, if the City does
not feel the site has achieved and maintained an adequate level of success, the City may
required the monitoring continue.
Each monitoring report will:
. Inventory all planted species, determine % survival and identify the specific
species and location of mortalities;
. Examine for the introduction of invasive or nuisance species; identify, quantify
and provide the specific location if present;
. Inventory all wildlife observed within and in the immediate vicinity of the
shelves;
. Provide photographs of each planting area;
. Provide comments on the appearance of overall health and viability;
. Conduct oxygen monitoring;
. Clearly identify any problems or non-compliance issues that may be present;
. Provide very specific recommendations on any problem that is identified; and
. Establish a deadline for the completion of each specific recommendation.
All monitoring event data will be provided to the City, to the Client and to the
maintenance contractor to assist in the effective control and eradication of nuisance and
invasive plant species.
MONTEREY BAY
WETLAND MITIGA T/ON AREA PROPOSED PLANTING PLAN
I II I - Spacingl Community - Elevation
Common Name Botanical Name Number of Designation Range Plant Type
Plants NGVD
cypress Taxodium spp. Clumps 10ft. Forested Area 8.6-9.6 7 gallon
On Center
100
~ red maple Acer rub rum Clumps 10ft. Forested Area 9.6-10.6 3 gallon
~ On Center
=' 50
a1 dahoon holly /lex cassine Clumps 10ft. Forested Area 9.6-10.6 3 gallon
"C
c On Center
III
II) 70
CIS wax myrtle Myrica ceritera 10 ft. On Buffer 10.6-14.3 1 gallon
f
< Center
"C 380
CD
-
II) cocoplum Chysobalanus 5 ft. On Center Buffer 10.6-14.3 1 gallon
f
0 icaco 1,500
u.
swamp fern B/echnum 3 ft. On Center Forested Area 8.6-9.6 bare root
serru/atum 2,050
beak rush Rhynchospora spp. 3 ft. On Center Marsh 7.6-8.6 bare root
4,700
spike rush E/eocharis spp. 3 ft. On Center Marsh 6.6-7.6 bare root
CIS 4,200
CD leather fern Acrostichum 3 ft. On Center Marsh 7.6-8.6 bare root
"-
< danaetolium 4,200
.c pickerelweed Pontederia cordata 3 ft. On Center Marsh 6.6-7.6 bare root
II)
"-
III 4,200
:i:
duck potato Sagitta ria spp. 3 ft. On Center Marsh 6.6-7.6 bare root
3,720
fi reflag Thalia genicuJata 3 ft. On Center Marsh 6.6-6.7 bare root
3,700
Total Trees, Shrubs & Transitional Plants Total Herbaceous Wetland Plants
4,150 24,720
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