The U.S. Army Corps of Engineers and contractor LKE Corporation raise the spillway at the Mount St. Helens Sediment Retention Structure by nearly 10 feet. The spillway raise project will trap sediment in the Toutle River before it flows downstream.
The U.S. Army Corps of Engineers and contractor LKE Corporation raise the spillway at the Mount St. Helens Sediment Retention Structure by nearly 10 feet. The spillway raise project will trap sediment in the Toutle River before it flows downstream.