Sherman Way and Mason Avenue looking east. There have been eight major floods in the Valley since 1861, but the Los Angeles River Flood in 1938 was one the worst. The rains lasted for 3 days and the Big Tujunga Wash levee broke. Seventy-seven of its spreading basins were destroyed. Telephones and electrical power was shut down. Buildings on the Warner Bros. lot and the Olive Avenue bridge were washed out. It took 30 days and approximately $60,000.00 to clean-up the storm debris. The introduction of flood control channels has alleviated most of the flooding problems of the past. Black and white photograph 3 x 4 in.