General
January 10, 2020
Welcome to the final CGS/RockTalk web iteration
If you want to find out what's happening with the new CGS site, read here! Apologies for the incompleteness, it will improve on a daily basis, we promise!
water
Hazards
July 12, 2018
Collapsible Soils
By Jonathan White, Senior Engineering Geologist (emeritus staff) At the end of the 19th and beginning…
Hazards
January 24, 2018
Subsidence (Water Education Foundation)
Geology
November 15, 2017
A new Water Resources Investigation: Upper Pierre Aquifer
Our friends over at the Colorado Division of Water Resources (CDWR) have just released Water Resources…
Hazards
March 13, 2013
The Science of Sinkholes
This video, from the U.S. Geological Survey, explores the geological factors behind sinkholes and the related science. Narrated by Randall…
Hazards
March 23, 2003
Case Study: Avalanche – Silver Plume
On March 23, 2003, a large avalanche occurred about one mile west of the Town of Silver Plume. The avalanche brought trees, rock, soil and snow to the valley floor, knocked down overhead utility lines, blocked the I-70 frontage road, damaged the town’s water treatment plant (WTP), and dammed Clear Creek. The dam was breached using explosives before the plant’s electric pump motors were flooded. With damage to the WTP’s chlorine contact tank and building, Silver Plume residents had to boil their tap water for over a month.
Hazards
November 20, 1980