How Mount St. Helens eruption still impacts local waterways decades later
The 1980 eruption of Mount St. Helens continues to affect local waterways, with approximately a million tons of sediment flowing annually down the Toutle River. The U.S. Army Corps of Engineers has implemented a sediment management plan to address flooding concerns and maintain navigation channels. Local communities, such as Castle Rock, face ongoing challenges due to sediment buildup impacting their water supply systems.