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“Bite-Size Bits of Local, National, and Global History”
Castle Rock in Cowlitz County, Washington — The American West (Northwest)
 

Mount St. Helens - You Are Edge of the Blast Zone

 
 
Edge of the Mt St Helens Blast Zone Marker image. Click for full size.
By Lora Mueller, January 27, 2011
1. Edge of the Mt St Helens Blast Zone Marker
Inscription.
The eruption of Mount St. Helens on May 18, 1980 triggered a huge landslide causing a powerful, laterally directed blast. A pyroclastic flow consisting of rock fragments, highly charged gas and super heated steam, devastated almost 150,000 acres of private, state and federal forests.

Side Bar:
In 1982 Congress established the 110,000 acre Mount St. Helens National Volcanic Monument. Inside the monument no salvage and no tree planting were permitted.
 
Erected by Wyerhaeuser.
 
Location. 46° 19.776′ N, 122° 26.239′ W. Marker is in Castle Rock, Washington, in Cowlitz County. Marker is on Spirit Lake Highway (Washington Route 504), on the right when traveling east. Click for map. This road is open seasonally so check ahead. Marker is in this post office area: Castle Rock WA 98611, United States of America.
 
Categories. DisastersEnvironmentHorticulture & Forestry
 
Close-Up of Photo Displayed on Marker image. Click for full size.
By Lora Mueller
2. Close-Up of Photo Displayed on Marker
In addition to Weyerhaeuser's forest damage, 3 logging camps, 22 crew buses, 30 log trucks, 39 railroad cars, 12 million board feet of logs, 650 miles of roads, 19 bridges and 16 miles of railroad were buried in ash or washed away by mud flows that swept down the Toutle River.

Not all the land damaged by the eruption was sacrificed to the mountain. Weyerhaeuser began a massive salvage and reforestation effort soon after the eruption. The quick rejuvenation of the forest helped to hasten the recovery of wildlife habitat and streams. Eventually people will benefit when these trees are harvested and manufactured into wood products. The healthy forest you see in this valley and along the highway is a result of those efforts.
Close-Up of Photo Displayed on Marker image. Click for full size.
By Lora Mueller
3. Close-Up of Photo Displayed on Marker
Of the landowners affected, Weyerhaeuser Company received the most damage when 68,000 acres of their St. Helens Tree Farm were devastated by the eruption. You are standing at the far edge of the blast zone where the extreme heat killed all the trees, but left some standing. This photo taken closer to the Mountain shows the trees blown down by the powerful "blast".
Entering the Blast Zone image. Click for full size.
January 28, 2011
4. Entering the Blast Zone
 
 
Credits. This page originally submitted on , by Lora Mueller of Silver Spring, Maryland. This page has been viewed 711 times since then and 9 times this year. Photos:   1, 2, 3, 4. submitted on , by Lora Mueller of Silver Spring, Maryland. • Syd Whittle was the editor who published this page. This page was last revised on June 16, 2016.
 
Editor’s want-list for this marker. Wide area view of the marker and its surroundings. • Photos of the area showing effects of the eruption and forest restoration. • Can you help?
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