Hansen Dam is a flood control dam in the northeastern San Fernando Valley, in the Lake View Terrace neighborhood of Los Angeles, California. The dam was built by the U.S. Army Corps of Engineers, Los Angeles District in 1940. Hansen Dam was named after horse ranchers Homer and Marie Hansen, who established a ranch in the 19th century.The Hansen Dam Recreation Center is located in the flood control basin and surrounding slopes behind the dam.GeographyHansen Dam and its now seasonal lake are located along the northern edge of the San Fernando Valley on Tujunga Wash. Tujunga Wash begins between the San Gabriel Mountains and Verdugo Mountains. The dam is 1mi downstream from the confluence of the Big Tujunga Creek and Little Tujunga Creek-Wash. It is southeast of the City of San Fernando.HistoryThe Los Angeles Flood of 1938, which included significant flooding along the Tujunga Wash and at its confluence with the Los Angeles River, increased support to dam and channelize the city's creeks and rivers. In 1939, due to repeated flooding and damage caused by them in the eastern portions of the San Fernando Valley, the U.S. Army Corps of Engineers began the project. In 1939 the Corps, by use of eminent domain, seized the horse ranch land of Homer and Marie Hansen to build to dam. The 2mi long, 97ft high dam was built to control the runoff and floodwaters.
