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Convair Cove Low Impact Development (LID) and Living Shoreline

Project Location

Brevard County

28.324374, -80.616380

Project Timeline

Duration: Under Construction

Project Contacts

Jessica Bruso

Additional Location Information

The project site is located in the central Banana River Lagoon between SR520 Causeway and the Pineda Causeway in Brevard County.

Project Summary

This project involves both stormwater LID elements and a living shoreline. The treatment train of LID BMPs will include permeable pavers, underground rain tanks, a BAM nutrient sorption barrier wall, and native plant rain garden bioswales. This system will not only serve to reduce the nutrient/pollutant loading to the IRL, but also reduce the amount of stormwater being directly discharged into the lagoon.

The living shoreline will be constructed adjacent to the south end bioswale to provide final runoff nutrient reduction, as well as nutrient uptake from the canal/lagoon water in situ. The living shoreline continues along the seawall for 360′ linear feet (2160 sq. ft. of oyster coverage) using innovative and traditional designs for both deep and shallow water.

Mangroves, oysters, and grasses will be included in this design. Since the Banana River Lagoon has a limited oyster population, oyster structures will be pre-seeded to ensure recruitment success.

Project Goals

Waterbodies Impacted: Indian River Lagoon and Banana River

BMAP – Indian River Lagoon, water quality improvements

The stormwater LID system will encourage more natural infiltration of stormwater into the ground water, thus replenishing the aquifer and helping to reduce saltwater intrusion.

Project Maintenance

Anticipated maintenance includes trimming the native grasses in the bioretention areas seasonally as needed. The pavers will be swept monthly (already part of our monthly street sweeping route), however biannually/annually the pavers will need to be vacuum swept to remove any debris/sand that may get in between the pavers.

The living shoreline should incur little to no maintenance as it naturally recruits filter feeders and the mangroves grow. It will be monitored for recruitment as well as plant growth (quarterly for the first year, biannually the next, and annually in subsequent years). Structural integrity will be monitored annually, and prior to any named storms forecasted to hit the area.

Annual Cost: $1,000

Project Cost & Funding

Total Construction Cost: $518,114
Applicant’s Share: $358,635 (69% – including 319(h), Save Our Indian River Lagoon, and IRL NEP grants)
Grant request: $159,479 (31%)

Community Engagement

This project has strong community support. It has been approved by City Commission as a part of the City’s 5-Year Capital Improvement Project Plan for the past 4 years and has been awarded funding through the SOIRL COC (Save Our IRL Citizens’ Oversight Committee), as well as FDEP.

This project has been presented to citizenry through the annual Citizens Academy program and has been presented to the City Sustainability Committee. This project will have a strong public outreach and involvement component, as well as a social media campaign.

Outcomes & Results

The monitoring effort for this project will include pre and post construction ambient surface water and groundwater sampling, with a focus on BMAP TMDLs. Post-construction BMP monitoring will include sampling well/ports for: stormwater runoff entering the LID system, post-permeable paver system prior to entering BAM nutrient sorption barrier wall, post-BAM nutrient sorption barrier wall, and when applicable, sampling of discharged overflow from the rain garden to the canal/lagoon. The living shoreline will be monitored for successful establishment on oyster structures and plant growth of mangroves and grasses.

Water quality/quantity benefits

168 lbs./yr. total nitrogen (TN) and 16 lbs./yr. total phosphorous (TP)

Additional Resources

Excerpt from Stormwater Plan

Bid Plan Set