DESCRIPTION
Island County applied for SRFB assistance to determine the cause of erosion and investigate means to protect the estuary in Ala Spit, a county park on Whidbey Island. The sand and gravel spit comprises about 8 acres, and protects a pocket estuary that is frequented by juvenile ESA-listed Chinook salmon and other salmonids. This project was administered by Island County Planning & Community Development. Cooperative partners were County Parks and WSU-Island County Beachwatchers.
Herrera Environmental Consultants was selected as lead contractor for the study which included the following: Existing information review; Historic and recent aerial photography and maps research; Geomorphic shoreline changes analysis; Ala Spit drift cell beach substrate characterization and assessment; Sediment effects development; Aquatic habitat characterization; Fish habitat use; Role of the Ala Spit dune plant community, driftwood, and riparian vegetation; Watershed characterization; Restoration assessment and recommendations.
Skagit River System Cooperative,WSU Island County Beachwatchers, and Island County Planning staff completed Juvenile salmon and Nearshore Fish Use in Shoreline and Lagoon Habitat within Ala Spit
Island County's surface water quality monitoring scientists completed Ala Spit Watershed Characterization
The final report Feasibility Study for Restoration of Ala Spit - Ala Spit County Park concludes that the primary cause of continued erosion is from a riprap revetment dating to the 1960s. The revetment has deflected natural deposition of sediments, reducing sediment input to Ala's estuary and resulting in loss of nearshore habitat. Removal of the riprap will expand forage fish spawning habitat and improve complexity in the marine environment. Long-term improvement in large woody debris recruitment is also likely to occur.