During late February and early March of 1938, a double-whammy of two storms swept in from the Pacific and pounded Los Angeles. Together they generated almost a whole year’s worth of precipitation in just a few days, and killed over a hundred people. The main consequence of the storms was that it was decided that the Los Angeles River ought to be concreted over to more effectively channel excessive flood water. Before I found this photo, I never really gave much thought to how the Army Corps of Engineers carried out the massive job. In this photo show us: With massive walls of prefab concrete.
John M says: “I believe that is a form not a prefab wall. See the funnels at the top to pour the concrete in. We can also see the rebar through the access points.”
William Conrad drove his car through the concrete-walled river on an episode of Cannon. (A climactic chase scene in a good film noir was filmed there, as well, although the movie’s name escapes me.)