Tampa Bay Region - Southwest Florida Water Management District

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SOUTHWEST FLORIDA WATER MANAGEMENT DISTRICT
FY2014 COOPERATIVE FUNDING INITIATIVE APPLICATION FORM
Project Name
Implementation of BMPs within the Sawgrass Lake Watershed
Project Number W288
Cooperator
Pinellas Park
Department
Contact Person Dennis Shaw
Address Po Box 1100
City Sate Zip Pinellas Park, FL 337801100
Phone #
727-541-0704 ext2312
Email
dshaw@pinellas-park.com
Project Type:
Water Supply X Water Quality Flood Protection Natural Systems
Strategic Initiatives:
X Water Quality Maintenance and Improvement Water Quality Monitoring
Alternative Water Supply Conservation
Reclaimed Water Regional Water Supply Planning
Emergency Flood Response Floodplain Management
Minimum Flows and Level Establishment and Monitoring Minimum Flows and Levels Recovery
Natural Systems Conservation and Restoration Natural Systems Identification and Monitoring
Indicate All Counties to Benefit From Project:
Charlotte Citrus Desoto Hardee Hernando Highlands Hillsborough Lake
Levy Manatee Marion Pasco X Pinellas Sarasota Sumter Polk
Project Description:
NOTE: This project was originally submitted for funding for the 2013 CFI cycle. It was rated a “medium” priority by SWFWMD staff
and approved for funding by the Governing Board. After submission of the original application, the City secured some funding for
the project through FDOT. Due to the addition of the FDOT funding and the inherent changes in project schedule due to the FDOT
LAP process, the project schedule and requested funding amounts have changed. The revised schedule pushes the construction
phase into FY 2014, thus the City is required to withdraw its original application and resubmit for funding for the FY 2014 CFI
program. Otherwise, the application and project remain unchanged.
Pinellas Park is a land-locked municipality with no direct outfall to Tampa Bay (TB), Cross Bayou or other coastal water body.
Therefore, stormwater collected within the City is routed to the eventual outfall through pipes, ditches and channels. Land use
within the City can vary drastically in a short distance resulting in industrial, commercial, residential and agricultural properties
within a single basin. With each land use contributing its own array of stormwater pollutants, the end outfall (typ. a ditch/channel)
can contain waters not meeting water quality standards. Future improvements within the Garnett/North Disston Subdivision entail
the construction of stormwater structures and piping. With the project area lacking collection structures, ponding in the travel lanes
results in unsafe driving conditions. The City also proposed to culvert certain sections of open ditch along 46th Street which can’t
maintain vegetation (steep slopes) as the City often responds to "wash outs".
The project area lies within the Sawgrass Lake (SL) watershed, which serves as a natural treatment facility enhancing water quality
prior to draining into TB (an impaired water body). SL is known to have high concentrations of heavy metals along with a large
population of non-native vegetation. Construction of the City's proposed improvements will result in a reduction in heavy metal (and
other pollutant) concentrations while minimizing the transport of non-native vegetation seeds. Further, the culverting of certain ditch
sections will cease the erosion of the banks and reduce the sediment transported to SL and TB.
To improve water quality within the SL and inherently TB, multiple BMPs are proposed. The proposed collection system consists of
four outfalls which discharge stormwater in the ditch paralleling 46th St. Hydrodynamic Separators (HS) will be placed on each of
these outfalls. An HS will also be placed on existing stormwater piping which conveys flows to a lake internal to the neighborhood.
This device will reduce sediment transport into the lake to improve water quality and habitat value. Prior to entering Channel 2A, a
sediment sump will be constructed in conjunction with a ditch block. While allowing sediment to settle is its primary utility, it also will
allow for water to percolate within the sump (and upstream ditch portions) until elevations exceed the top of the ditch block.
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