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PROJECT OBJECTIVE(S) : There are 17 segments of the Indian River Lagoon basin that were identified on the Florida Department of Environmental Protection ( DEP) 1998 303(d ) list as impaired by nutrients , dissolved oxygen , or chlorophyll a and were scheduled for TMDL development by June 30 , 2003 . All of these segments fall within the FL DEP Indian River lagoon Group 5 Basin and , as a result, were scheduled for TMDL development by FL DEP in September 2004 . The segments in Indian River County that will be addressed by this project are named South Indian River WBID 5003C, IRL Segments 16-20. The Main Relief canal basin is segment # 19 . Due to the extensive network of canals that carry stormwater runoff in this region , Indian River County is in a unique position to capture and treat a significant portion of its total runoff. The Main Relief Canal conveys approximately half of the total runoff from the Indian River Farms Water Control District to the Indian River Lagoon . The proposed bar screen system will remove a significant quantity of nutrients and muck contributing solids from canal discharges. (TSS=411 ,000 Kg per year, TN =21 , 200 Kg per year, TP= 5, 200 Kg per year) . Removing these nutrient loads will move the County closer to meeting the TMDLs for this segment of the lagoon . Specific Project Obiectives : ( 1 ) To demonstrate that a combination of treatment technology ( i . e. self-cleaning bar screens and pumped sedimentation sumps) can be used to effeciently remove large amounts of floating and suspended material from an existing canal . (2) To demonstrate that a large stormwater pollution control device if maintained on a regular basis, can remove significant amounts of pollutants. (3) To demonstrate that if large quantities of aquatic plant material and algae are removed from the system , then large amounts of nutrients (nitrogen and phosphorus) associated with that plant material and algae are also removed . PROJECT DESCRIPTION : The Indian River Farms Water Control District ( IRFWCD) in Indian River County, Florida is an area over 53,000 acres that is drained by an extensive network of man-made canals . The IRFWCD discharges into the Indian River Lagoon , an Estuary of National Significance and a St. Johns River Water Management District (SJRWMD) Surface Water Improvement and Management (SWIM) program priority water body. In the East Indian River County Master Stormwater Management Plan (Master Plan) , a pollutant loading analysis showed that the three discharge canals of the IRFWCD convey large amounts of suspended solids, nutrients, and floating vegetative debris into the lagoon . Treatment alternatives were investigated in the Master Plan . It was recommended that sediment and floating debris collection systems be used to effect a significant reduction in suspended solids , nutrients, and floatables into the Lagoon . This project is for the construction of a large treatment device on the Main Relief canal that utilizes self-cleaning bar screens and pumped sedimentation basins to remove solids and floating debris from canal water. The proposed location of the treatment facility is west of US Highway 1 and the FEC railroad near the Vero Beach airport. The project will be constructed within the publically owned right-of-way of the Indian River Farms Water Control District. Fixed bar screens will be integrated with a traveling rake to remove large masses of vegetative debris such as hyacinths , water lettuce, duckweed and grasses and floating trash before the water enters the vortex unit. In addition , the pumped sedimentation basin will remove settleable suspended sediments. Based on water quality data for the Main Relief Canal and a design flow rate of 294 cfs , the following annual pollutant load reductions are estimated : DEP Agreement No. GO 182, Attachment A- 1 , Page 5 of 12