The area will be closed off for sport fishing starting March 1 this year. This covers the downstream from the Del Valle, San Antonio and Calaveras reservoirs. These usually supplies about fifteen percent of the water supply of entire San Francisco.

The decision was approved by the California Fish and Game Commission last December. This is in an active bid to save rainbow trout and steelhead trout among others in the third largest tributary behind San Joaquin and Sacramento rivers.

Alameda Creek Alliance Director Jeff Miller said that the local population of trout has almost disappeared which made it impossible to fish. Miller is a conservation advocate for the Center for Biological Diversity.