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Draft Indian River County Lagoon Management Plan Outline April 2019 o Phase 1 Objective: Identify innovative projects and develop efficiencies in pounds Reduced per year of TN, TP, and biomass for proposed projects. Evaluate projects in basins by priority ranking by loading and cost-effectiveness. o Phase 2 Objective: Identify specific projects to Reduce the TN, TP, and biomass,load (pounds per year) to meet or exceed the TMDL and BMAP requirements. The goal will be measured in pounds of TN and TP removed and cost per pound. • Organic Material and Sediments: o Phase 1 Objective: Identify areas that are contributing large quantities •f organic material such as leaf litter and grass clippings, as well as sediments, to the lagoon sy em. Determine locations in tributaries and canals with large amounts of floating aquatic veget. ion. o Phase 2 Objective: Establish and implement a plan to Reduce e amount of organic material and sediments entering the lagoon system, including a plan to mechanically harvest floating aquatic vegetation instead of using herbicides and installation of baffle boxes, sedimentation traps, and underground exfiltration systems. • Water Consumption: o Phase 1 Objective: Reduce the volume of water us: d for irrigation as well as household and commercial use through education, outreach, reg ations, and ordinances. The goal is to Rally the community to Reduce runoff and point sour - discharge volume. o Phase 2 Objective: Reduce the volume of wa er used for irrigation as well as household and commercial use through education, outreac , regulations, and ordinances. The goal is to Rally the community to Reduce runoff, potable ater supply, wastewater treatment plant loading, and point source volume. The goal will be m=.sured in gallons per person per day. 2.3 REVITALIZE Human interactions have impaired natural IRL ha tats. While a complete restoration of natural state is not possible given the built environments, a priority tion to enhance and Revitalize seagrasses, filter feeders, planted shorelines, and wetlands will be funda ' ental to Revitalize the stability and biodiversity of the IRL. • Seagrass: o Phase 1 Objective: Evalu- e all available data on seagrass planting projects to assess the cost/benefit ratio and ova rall success. Identify what variables are present that may affect the successful establishm = t of seagrass. Identify and prioritize areas to Revitalize seagrass. o Phase 2 Objective: evitalize seagrass beds in critical areas to achieve seagrass coverage similar to the 2009 :JRWMD Seagrass Survey. The goal will be measured in square feet of coverage to be pl..nted or obtained through natural creation and dollars per square foot. • Filter Feeders: o Phase 1 Obj Live: Identify and prioritize areas to Revitalize filter feeder bars and reefs and aquaculture o Phase 2 e .jective: Revitalize filter feeder bars and reefs and aquaculture. The goal will be measur in estimated volume of water filtered per year by created filter feeder population. • Wetlands and iving Shorelines: o Ph., e 1 Objective: Identify and prioritize areas to Revitalize wetlands and living shorelines. aTETRA TECH 7