DESCRIPTION
The project will complete 60% and final engineered restoration designs and permitting for the nearshore areas of the east spit on the Port Gamble shoreline. The design will build on the preferred alternative of the 30% engineered restoration design analysis completed by Environmental Science Associates (ESA) in 2022 and Coastal Geologic Services (CGS) coastal analysis completed in 2021. ESA's 30% restoration design includes intertidal excavation to remove armor and approximately71,000 cubic yards of fill in the nearshore. The design calls for the placement of approximately 37,000 cubic yards of mixed backfill material in three layers, including a bottom filter layer, middle rock layer and upper habitat substrate layer. The project will reshape intertidal and subtidal slopes to create beach and nearshore habitat. Based on CGS' coastal study and ESA's evaluation of longshore transport, ESA recommends slopes of 12H:1V at elevations below 3 feet and 8H:1V atelevations above 3 ft. These actions will restore sediment supply, sediment dynamics, net shoredrift and shore form diversity, resulting in an improved beach profile, improved sedimentcomposition and improved nearshore migration habitat.
The project will complete preliminary and final engineered restoration designs and permitting for the nearshore areas of the east spit on the Port Gamble shoreline. The design will restore nearshore habitat for the Hood Canal Summer Chum salmon ESU by improving rearing refuge habitat in the Port Gamble embayment on the east side of Hood Canal. The restoration will improve food web interactions, shelter and nearshore connectivity for out-migrating juvenile HC Summer Chum salmon during the estuarine stages. By removing the shoreline armor and improving nearshore processes, the project will enhance forage fish spawning, increase eelgrass growth and increase out-migrating salmon growth and survival. PSNERP identifies the SPU with high potential for restoration of nearshore barrier embayment and beach habitat. The design will build on the preferred alternative of the conceptual 30% engineered restoration design analysis completed by Environmental Science Associates (ESA) in 2022 and Coastal Geologic Services (CGS) coastal analysis completed in 2021 (ESRP 18-1748). The project will reshape intertidal and subtidal slopes to create beach and nearshore habitat. These actions will restore sediment supply, sediment dynamics, net shore drift and shore form diversity, resulting in an improved beach profile, improved sediment composition and improved nearshore migration habitat for HC Summer Chum salmon, Pacific Herring and other forage fish.
Kitsap County- Nearshore
