The National Marine Fisheries Service issued a report in April 2016 summarizing the 5 year recovery status of Steelhead Trout in the Central California Coastal designated region. Unlike other Pacific salmonids, Steelhead can spawn more than once. In biological terms, this is called iteroparity.
This distinct population segment, or DPS, includes naturally spawned anadromous O. mykiss (steelhead) originating below natural and manmade impassable barriers from the Russian River to and including Aptos Creek, and all drainages of San Francisco and San Pablo Bays eastward to Chipps Island at the confluence of the Sacramento and San Joaquin Rivers. Also, steelhead from two artificial propagation programs:
- Don Clausen Fish Hatchery Program
- Kingfisher Flat Hatchery Program (Monterey Bay Salmon and Trout Project)
This includes several important Bay Area creeks. Alameda Creek is listed as an "essential population". Pinole, San Pablo, Wildcat, Codornes, San Leandro and San Lorenzo Creeks in Contra Costa and Alameda Counties are lsited as "supporting populations." The NMFS recommendations are as follows:
"Improving conditions for CCC steelhead requires improved passage,habitat, flows, and population viability. Passage improvements are needed to remedy both partial and complete barriers to migration and reach-scale movement of adults and juveniles. Habitat improvements should include attention to in -stream and estuarine habitat complexity, and the geomorphic and watershed processes that support habitat function. Flow protections and improvements are needed to protect all life stages and habitat, and should support base (low) flows, natural -type hydrographs, and groundwater resources. Improved population monitoring is needed to better understand the status of populations and the DPS"
Details can be found at this link: