Have you walked along the canal lately? It looks a little slow, perhaps not moving at all; the vegetation seems to be increasing 10 fold every day; you’re expecting to see the next step in the evolutionary process to crawl up on the bank. It’s all true. The Bureau of Reclamation, an agency of The Department of the Interior, has started $6.33-million project to install a fish screen at Rock Slough, where water is intercepted from the Delta and diverted into the Canal.
The Contra Costa Canal is part of the Central Valley Project’s Delta Division. The diversion at Rock Slough is the beginning of the 48 mile Canal, the major water supply and delivery system for the Contra Costa Water District (CCWD). The Canal diversion at Rock Slough is one of the largest unscreened Delta sites. A number of resident and migratory fish species, including the threatened Delta smelt and the endangered winter-run Chinook salmon, can be drawn into the Canal. This project will construct a fish screen to keep fish from entering the Canal intake. CCWD had to isolate the Canal for safety reasons while this work is being done. They are sending crews up to clean up and they will test and treat to ensure no mosquito larvae can live.
Congressman George Miller has provided a flickr slide show on his blog.