The Works Progress Administration employed hundreds of thousands of people during the Great Depression. A lot of those works involved concrete, and many well-made sidewalks and gutters around Oakland bear the “WPA” stamp from 1939, 1940 and 1941.
In Dimond Canyon, WPA projects were funded to remove landslides, build fire trails and run a sewer line down the bed of Sausal Creek. Finally, the WPA paid crews to put in a bunch of concrete channels and culverts for flood and erosion control. That was in 1939.
A lot of that work has been undermined by erosion. Eventually the stream will have its way again, unless the authorities find a need there and fill it again.
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