Whittier Narrows Flood Zone
Created by the Army Corps of Engineers in August 1986, these maps have been scanned and stitched together in Photoshop to show the entire area in Los Angeles and Orange Counties. The Whittier Narrows Dam was built to be big enough to hold the water from four dams upstream in a disastrous situation. The Dams in the mountains were built in the 1930s the WN Dam in 1957. The WN Dam was not built to hold water like a lake.