Pyrite Geology, Hazards, Publications, Water 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 for human consumption, or for aquatic life? The existence of natural acid rock drainage (NARD) suggests a “no” to the former, and a “yes” to the latter question. But…
Check dams along drainage ditch Hazards, Water January 14, 2022 Case Study: stormwater Stormwater runoff is excess water associated with a rain or snow storm event that flows over the land surface and is measurable in a downstream river, stream, ditch, gutter, or pipe. From a regulatory perspective, stormwater is managed through some sort of engineered conveyance and is focused…
The Arikaree River at Beecher Island in Yuma County Publications, Water June 7, 2020 New Colorado Groundwater Atlas released ON-010 Colorado Groundwater Atlas
A uranium-rich zone in a sandstone of the Morrison Formation, Carnation Mine, San Miguel County, CO, January 2007. Photo credit: Chris Carroll (CGS). Energy, Minerals February 19, 2020 Colorado’s Uranium Deposits [Ed: this document, written in 2011 by Jim Burnell, Ph.D., P.G. (former Senior Minerals Geologist, Colorado Geological Survey), provides an excellent narrative on the sources of uranium deposits on the Western Slope of Colorado. However, it’s not the whole story—there is fascinating new science research implicating biological/organismic activity underground that…
A large sinkhole opened in January 2005 at the Ironbridge Development and Golf Course Hazards January 17, 2005 Case Study: Roaring Fork sinkhole [ED: This report from January 17, 2005 was written by Jon White, (Senior Engineering Geologist, Emeritus). Lightly edited for dated references it highlights a hazardous geological regime in the central Colorado Rockies around the Roaring Fork River Corridor.] Last week, while on the Western Slope, I was informed by…