Big Tujunga Dam
The 380th tallest dam in the world
Big Tujunga Dam is a 244-foot-high (74 m) concrete arch dam in Los Angeles County, California, spanning Big Tujunga Canyon northeast of Sunland, in the foothills of the San Gabriel Mountains. Completed in 1931, it provides flood control and groundwater recharge for the San Fernando Valley. Its reservoir is called Big Tujunga Reservoir, and collects runoff from a watershed of 82 square miles (210 km2). Although it is located inside the Angeles National Forest, public access to the lake is forbidden. The water is usually kept at a low level, in order to protect against winter floods. The name of the dam is derived from a Tongva village name.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).