Harbour
Isle Development, Florida
Coastal Systems International Inc. designed and developed
a plan for a marina as part of the Harbour Isle residential
development on Causeway Island. A 63-slip marina is to
be located in a dredged harbor basin with a flushing culvert.
Coastal Systems has conducted hydrographic
and marine resource surveys of project shoreline for use
in analyzing potential environmental impacts and development
of project alternatives with minimization and mitigation
of impacts. The hydrographic work extended into Indian
River and Fort Pierce to provide sufficient data required
for the design of the proposed basin entrance and flushing
culverts.
Coastal Systems secured environmental permits from
the U.S Army Corps of Engineers (USACE) and the South
Florida Water Management District (SFWMD) for the marina
and associated seagrass and wetland mitigation projects.
Coastal Systems, in coordination with sub-consultants,
designed the seagrass and wetland mitigation projects,
which include:
- Filling of a 1.6 acre dredge
hole to mitigate for
approximately 0.4 acre of seagrass impact caused
by channel dredge activity. Restoration includes
transplanting seagrass from the proposed impact
areas and additional donor sites to the filled
dredge hole.
- Onsite creation of 3.4 acres
of saltwater marsh habitat to mitigate the removal
of 4.6 acres of
freshwater wetlands. Additional compensation
will
be provided by onsite exotic vegetation removal
and establishment of protective buffers between
the upland development and wetlands.
- Construction of the marina,
upland development
and mitigation areas were designed specifically
to minimize impacts to natural resources.
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