A slow-moving landslide, located on Rattlesnake Ridge beyond Union Gap, Wash, will be monitored by the Washington State Department of Transportation.
The first signs of landsliding were detected in October 2017. About 60 people evacuated their residences that were located in the base of the slope.
Geologists studied the movement of the ground to evaluate the potential hazard. The investigation showed that the failure will probably occur progressively, in a slow pace. The 8-million-tons rock mass will finally fall in a quarry pit.
Columbia Asphalt, which operates the aforementioned quarry, hired a contractor to monitor the hillside as part of a deal with the state Department of Natural Resources. An official announcement about the installation of the new equipment was quickly issued. "The reason for this update is to provide advanced notification to the public in order to reduce the presumptions that may arise if left without explanation," the agency commented.
No official report about the causes of the landslide has been issued yet.
Source: Govtech.com
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