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Ground-water conditions in the Green Pond landslide, Weber County, Utah

Ground-water conditions in the Green Pond landslide, Weber County, Utah
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By: F. X. Ashland, R. E. Giraud, G. N. McDonald, and A. H. Elliott

The Green Pond landslide is a large historically active landslide crossed by SR-226 in Weber County, Utah. The landslide is elongate, somewhat irregularly shaped, about 7800 feet long, and has a length to width ratio that varies between about 78:1 and 7:1. Monitoring and observations indicate that the landslide is recurrently or possibly even continuously active, but can be subdivided into currently active and inactive parts.

As part of geotechnical investigations for State Route 226, seven monitoring wells were installed in and near the Green Pond landslide, a large, historically active landslide in the Norwood Tuff. Data from two of these wells, collected by the Utah Department of Transportation, provide information on ground-water level fluctuations over an approximately six-year period between 2000 and 2005. In addition, we monitored ground-water levels monthly at three wells, and made periodic ground-water level observations at two others between June 2006 and December 2007. This report summarizes the results of our ground-water-level monitoring and analysis of the UDOT data.

Other Information:
Published: 2008
Pages: 8 p.
Location: Weber County
Media Type: Paper Publication

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