A bill to authorize the U.S. Army Corps of Engineers to construct, operate and maintain a single retention structure for controlling sediment flowing from eruptions of Mount St. Helens.

Authorizes and directs the Secretary of the Army, acting through the Chief of Engineers, to construct, operate, and maintain a single retention structure for use in controlling flow sediment from eruptions of Mount St. Helens, Washington.

Authorizes and directs the Secretary to undertake conforming activities downstream from Mount St. Helens for flood protection along the Cowlitz River.