Water
January 14, 2022
Case Study: stormwater
Stormwater runoff is excess water associated with a rain or snow storm event that flows over the…
case study
Hazards
August 22, 2011
Case Study: The Trinidad, Colorado Earthquakes
[ED: Originally published in 2011 by Vincent Matthews, former State Geologist at the CGS.] Around midnight on August 22,…
Hazards
July 6, 2005
Case Study: Rockfall – Glenwood Springs
The town of Glenwood Springs in west-central Colorado lies at the confluence of the Roaring Fork and Colorado rivers.
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
June 19, 1995
Case Study: Rockfall – Manitou Springs
by Jon White 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.