From the Chron: Fishing Ban on Alameda Creek to Save Steelhead Trout

"2-year fishing ban to save Alameda Creek trout"
The steelhead trout have pretty much vanished from Alameda Creek, so state officials decided it was time to ban fishing.
Sport fishing will be closed for at least two years starting March 1 downstream from the San Antonio, Calaveras and Del Valle reservoirs, which typically supply about 15 percent of San Francisco's water supply.