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ATTACHMENT 3 GRANT WORK PLAN PROJECT TITLE: Osprey Acres Floway and Nature Preserve PROJECT LOCATION: The Project will be located at 925 5th Street SW,City of Vero Beach,Indian River County,Florida. See Figure 1 for a location map and Figure 2 for a site plan view. PROJECT BACKGROUND: The proposed Osprey Acres Stormwater Park will receive effluent from Osprey Marsh,an abutting regional pollution control facility that receives and treats up to 10 million gallons per day (mgd) of canal water and up to 1.5 mgd of reverse osmosis concentrate from a water treatment plant.Osprey Acres will further reduce the total nitrogen(TN)and total phosphorus(TP)in Osprey Marsh's effluent and from additional unprocessed canal water. Osprey Acres is sized to treat up to 12 mgd and all treated water will flow to its original discharge point, the Indian River Lagoon. After construction is complete, Osprey Acres will function as a Managed Aquatic Plant System (MAPS), meaning those treatment units which accumulate nutrients through settling,direct plant uptake,or both,will be harvested through mechanical means and the harvested material windrow will be composted onsite or elsewhere,and potentially distributed for reuse within the wider community. Osprey Acres Stormwater Park will be operated with a strategic goal of sustainable nutrient removal and recovery; environmental enhancement and promotion of species diversity within a previously disturbed ecostructure through emulation of pre- disturbed conditions; optimization of community opportunities for education and nature studies; and demonstration of the benefits of nutrient recovery and reuse. PROJECT DESCRIPTION: The Grantee will construct the Osprey Acres Stormwater Park,which will include the primary treatment train processes, attendant infrastructure for operation of the facility as a MAPS,and approximately six acres dedicated to an ancillary,created wetland,which will involve removal of exotics and creation of wetland features.The system will receive effluent from the Osprey Marsh Algal Turf Scrubber's effluent polishing pond and additional untreated canal water. The main treatment train follows this general sequence: Settling ponds, floating aquatic plant scrubbers,filter marsh units,shallow marsh systems,and a series of floways in which submerged and emergent aquatic plants will be cultivated. The system is projected to remove between 3,700 to 8,400 pounds/year TN and 315 to 370 pounds/year TP. Infrastructure for the harvesting and composting of material will include the following access and maintenance provisions for attendant equipment and personnel: Drainage and windrow pads between the parallel units for processing harvested material,areas for solids processing and temporary material storage, site entrance road,driveway,parking area,site fencing and gates,operations building,and millings service road and work pad areas. Other features will include walking paths for community use. TASKS and DELIVERABLES: Task 1: Construction and Project Management Task Description: The Grantee will construct the Osprey Acres Stormwater Park in accordance with the construction contract documents. The project includes construction of the following: Piping connections to the Osprey Marsh Algal Turf Scrubber's effluent polishing pond;untreated canal water influent piping; two settling ponds; two floating aquatic plant scrubber units; two filter marshes; two shallow marsh systems; floway system; process connection piping; water control structures; discharge piping into the receiving water body;creation of wetland;walking paths;and infrastructure for operation of the facility as a MAPS. The Grantee will also perform construction oversight and project management,to include field engineering services,construction observation,site meetings with construction contractor,and design professionals,and DEP Agreement No.NS027,Attachment 3,Page 1 of 7