When Will Rattlesnake Ridge Slide Near Yakima ‘Go’? Geologists Say It’s Hard To Predict

Washington Department of Natural Resources Landslide Hazards Geologist Trevor Contreras says the slide at Rattlesnake Ridge is moving at a constant rate--and that makes it difficult to predict when it might totally let go. ANNA KING / NORTHWEST NEWS NETWORK

Listen

After huge cracks appeared on Rattlesnake Ridge last year, geologists expect a landslide is coming at the mountain near Yakima. But they are having a hard time nailing down just when it will go.

Trevor Contreras is a hazards geologist for the Washington State Department of Natural Resources. At a press conference Friday, he said the Rattlesnake Ridge landslide is moving about 3 inches per day—about 1.7 feet per week.

But since that movement is so consistent, it creates a weird problem for those watching the slide. There aren’t many clues as to when the slide might totally let go.

“It’s not speeding up, it’s not accelerating,” Contreras said. “Because it’s not accelerating—and going such a constant rate—we are projecting that the main event window is hard to determine.”

Contreras said they thought the event would happen from mid-January to mid-March, but now they might push that timeframe out.

Copyright 2018, Northwest News Network

Related Stories:

Rattlesnake Ridge Risk Map - Google Maps

Still Sliding, Just Not So Fast: What’s Up With The Rattlesnake Ridge Landslide One Year Later

At this time last year, authorities in Central Washington were on high alert because of the slow-moving Rattlesnake Ridge landslide near Yakima. A year later, what’s changed? The landslide isn’t quite over – yet. But it has slowed down significantly.
Continue Reading Still Sliding, Just Not So Fast: What’s Up With The Rattlesnake Ridge Landslide One Year Later

Read More »
Antonio Martinez and his son, Ramon Mendoza

For Displaced Rattlesnake Ridge Residents, Emergency Goes On As They’re Told To Return Home

The emergency is over for now at Rattlesnake Ridge near Yakima. The state says a major, sudden landslide is no longer imminent, and Yakima County has lifted its evacuation order and told residents they can move back home. But that’s easier said than done.
Continue Reading For Displaced Rattlesnake Ridge Residents, Emergency Goes On As They’re Told To Return Home

Read More »