Hazards
July 21, 2022
Case Study: NARD
Are pristine mountain waters always clean and pure? Can streams unaffected by human activities and livestock influences be unfit…
Hazards
July 21, 2022
Are pristine mountain waters always clean and pure? Can streams unaffected by human activities and livestock influences be unfit…
Geology
April 11, 2022
Small but significant areas of Colorado are underlain by bedrock that is composed of evaporative…
Water
January 14, 2022
Stormwater runoff is excess water associated with a rain or snow storm event that flows over the…
Energy
November 19, 2021
The CGS has long been involved in researching the characteristics of geothermal energy across the state,…
Hazards
July 12, 2018
By Jonathan White, Senior Engineering Geologist, Emeritus At the end of the 19th and beginning of…
Hazards
August 22, 2011
[ED: Originally published in 2011 by Vincent Matthews, former State Geologist at the CGS.] Around midnight on August 22,…
Hazards
July 10, 2009
The CGS studied the site of St. Francis of Assisi Church in Castle Rock extensively after a block detached from…
Hazards
July 6, 2005
The town of Glenwood Springs in west-central Colorado lies at the confluence of the Roaring Fork and Colorado rivers.
Hazards
June 21, 2005
Rockfalls and rock slides are common along transportation corridors in the Rocky Mountains. Clear Creek Canyon just west of Golden…
Hazards
April 26, 2005
For decades, the west side of the Colorado School of Mines (CSM) main campus had subsidence issues related to…
Hazards
January 17, 2005
[ED: This report from January 17, 2005 was written by Jon White, (Senior Engineering Geologist, Emeritus). Lightly edited for dated…
Hazards
March 23, 2003
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.
Geology
February 4, 2003
In early February of 2003, a 24-foot-wide (7.5 m) sinkhole spontaneously opened on a soccer field at the Colorado Mountain…
Hazards
June 19, 1995
[ED: This report from 1995 was written by Jon White, (Senior Engineering Geologist, Emeritus). It looks at a specific rockfall situation in the central Front Range town. ] Manitou Springs occupies a narrow valley where Fountain Creek emerges from the foothills northeast of Pikes Peak and west of Colorado Springs. The valley slopes are composed of interbedded resistant sandstone and conglomerates (i.e., gravelly sandstone), and weaker mudstones and shale. The outcropping sandstone is most prevalent on the steeper slopes on the north side of the valley.
Geology
August 9, 1967
Major magnitude 5.3 earthquake shock in Denver One of the strongest and most economically damaging earthquakes to affect the…
Geology
November 7, 1882
It has been 140 years since “The Big One”: Colorado’s largest historic earthquake: November 7, 1882 – Magnitude 6.6. On…