Pictured is an aerial view of portions of the Los Angeles River. The U.S. Army Corps of Engineers Los Angeles District has several roles in operating, maintaining and regulating the LA River, as well as managing federal lands. Under the Los Angeles County Drainage Area project, the Corps operates and maintains several dams and portions of the river's channels and tributaries. The river flows through seven different congressional districts, 10 city council districts, 20 neighborhood councils and 12 community-planned areas.