Stevenson in Skamania County, Washington — The American West (Northwest)
Cataclysms on the Columbia
As the massive Cordilleran Ice Sheet advanced from Canada during the last Ice Age, it damed rivers in Montana with up to 2,000 feet of glacial ice, creating huge lakes. The larger of these, 3,000-square-mile Glacial Lake Missoula, held over 500 cubic miles of water - half the volume of Lake Michigan.
When rising water broke the ice dams, tremendous floods burst across the land and down the Columbia River. Then the ice dammed the rivers and the lakes rose again. This lead to repeated torrents of water and ice raging down the Columbia Gorge - as many as 100 deluges over approximately 3500 years. The flood waters hammered at the mountains, causing vast landslides, scouring away soil at elevations up to 1,000 feet, and creating the spectacular escarpment and bluffs that inspire us today.
It's hard to imagine the sheer magnitude and force of the water that blasted through the Gorge during the Ice Floods. In the area
Erected by Columbia River Gorge National Scenic Area.
Topics. This historical marker is listed in these topic lists: Disasters • Waterways & Vessels.
Location. 45° 41.566′ N, 121° 52.766′ W. Marker is in Stevenson, Washington, in Skamania County. Marker can be reached from Southwest Cascade Avenue near Leavens Street, on the right when traveling west. Touch for map. Marker is at or near this postal address: 40 Southwest Cascade Avenue, Stevenson WA 98648, United States of America. Touch for directions.
Other nearby markers. At least 8 other markers are within one mile of this marker, measured as the crow flies. Wind Mountain (about 600 feet away, measured in a direct line); Steamboats Docked at Stevenson (about 800 feet away); "The Great Shoote" (approx. 0.2 miles away); Stevenson Washington (approx. 0.2 miles away); "White Lightning" In The Back Alley (approx. 0.2 miles away); Great Depression Threatens Bank (approx. 0.2 miles away); "Stump Lifter" Elected First Mayor (approx. 0.2 miles away); Gatekeepers of the Columbia (approx. one mile away). Touch for a list and map of all markers in Stevenson.
More about this marker. The marker is located on the waterfront, behind the building on Southwest Cascade Avenue.
Credits. This page was last revised on October 19, 2020. It was originally submitted on October 19, 2020, by Barry Swackhamer of Brentwood, California. This page has been viewed 38 times since then and 3 times this year. Photos: 1, 2. submitted on October 19, 2020, by Barry Swackhamer of Brentwood, California.