Middle St. Johns - Florida Department of Environmental Protection

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228 Water Quality Assessment Report: Middle St. Johns way to reduce runoff volumes. The project was funded by special legislative appropriation for fiscal year 2001/2002. • Aquatic plant revegetation: The SJRWMD has initiated an aquatic planting plan to improve fisheries habitat in Lake Jesup. The project will also help to evaluate aquatic vegetation growth patterns in various substrates. • Construction of a box culvert along State Road 46 and Lake Jesup: In partnership with the Florida Department of Transportation and the city of Sanford, the SJRWMD has completed the design of a double concrete box culvert , approximately one mile west of the Geneva Bridge, that would reconnect the lake’s floodplain and provide a wildlife crossing. Construction will begin once flowage easements are obtained from private landowners. • Removal of levees at the Lake Jesup Conservation Area and the North Lake Jesup Conservation Area: Removing the levees has reconnected 3,682 acres of wetlands to the lake and will improve fisheries and wildlife habitat. It has also expanded the lake’s storage volume, increasing flood protection in surrounding areas. Seminole County has provided additional lake access for public use and established a public park along the southwest shore. • Seminole County subdivision stormwater retrofit program. The county has initiated early planning for the program. Approximately 2,058 subdivisions in Seminole County were platted and constructed prior to 1983, before the development of the SJRWMD's stormwater rule. Approximately 1,420 plats are in the unincorporated areas of the county. The retrofit program is needed most in the Lake Jesup watershed but also includes other watersheds in the county. • Removal of the State Road 46 causeway and elevation of a new bridge over Lake Jesup. The Florida Department of Transportation is in the planning phase of the project, which will allow important internal and external lake recirculation. The U.S. Army Corps of Engineers is determining how best to remove flowage impediments beneath the new bridge. • Navy Canal Flood Attenuation and Retrofit Project: A section of the Navy Canal flows over its banks, causing flooding and increasing the erosion and washouts of downstream structures. The proposed correction involves constructing a 6.4-acre wet detention pond with associated control structures north of Sand Dollar and regrading a segment of the Navy Canal. The pond will also provide water quality treatment for the watershed. The project is projected to reduce pollutant loads by 20,500 pounds per year. • Cameron Ditch Project: The proposed project for Cameron Ditch includes the construction of a 4-acre wet detention facility to provide water quality treatment for a tributary drainage area of approximately 416 acres. The Watershed Management Model
Water Quality Assessment Report: Middle St. Johns 229 (WMM) predicts that the facility will remove approximately 45,000 pounds of phosphorus per year. Lake Monroe Planning Unit STAKEHOLDERS Stakeholder groups affiliated with Volusia County government are described under the Deep Creek Planning Unit. LOCAL GOVERNMENTAL INITIATIVES The SJRWMD is developing minimum flows and levels (MFLs) for the Middle St. Johns River near State Road 44 in Volusia County. Rule making on the proposed flow levels is not anticipated till April 2003. Seminole County has completed master plans for several watersheds in the planning unit, including the Midway, Sanford, and Lake Monroe watersheds. The plans identify deficiencies and include recommendations for remediation projects. A 2001 legislative appropriation of $1 million provided funding for the Lake Monroe and Midway watersheds. The city of Deltona is developing a Watershed Management Plan to address water quality and flood protection needs. Due to increased development and increased concerns about flood damage, the SJRWMD asked the National Weather Service’s Southeast River Forecast Center to develop and implement a flood forecast system for the southern portion of the Middle St. Johns Basin. The model is being verified and is scheduled for implementation within one year. It will focus on the Lake Monroe watershed. Activities directed by Volusia County are listed under the Deep Creek Planning Unit. PROJECTS • Lake Monroe Basin Watershed Plan Implementation/Seminole County: Water quality and flooding problems are common in the planning unit. Many areas were developed before the implementation of stormwater regulations, resulting in the direct discharge of untreated stormwater to Lake Monroe and the St. Johns River. In several areas of the Midway watershed, retrofits are needed to improve surface water quality and quantity. Master planning efforts by Seminole County have identified locations for remediation projects. • Remediation projects to solve flood problems and improve water quality: A number of projects have been identified and will be implemented through funding from special legislative appropriations. The remediation projects, which include measures to improve stormwater water quality discharged to receiving bodies, are as follows: − Cameron Avenue Drainage Improvements and Water Quality Retrofit Project: Water from the drainage area receives no treatment and
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Middle St. Johns - Florida Department of Environmental Protection

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