70 results — topic: Environmental Contamination
Digital Data from Mineral Investigation of Sangre de Cristo Wilderness Study Area, Alamosa, Custer, Fremont, Huerfano, and Saguache Counties, Colorado, USA
This Data Release provides tabular and geospatial data digitized by the U.S. Geological Survey (USGS) from a U.S. Bureau of Mines (USBoM) report titled Mineral Investigation of Sangre de Cristo Wilderness Study Area, Alamosa, Custer, Fremont, Huerfano, and Saguache Counties, Colorado. The original p
Dataset for temporal influences on selenium partitioning, trophic transfer, and exposure in a major U.S. river
The trace element selenium is an essential element with a narrow window between concentrations needed to support life and those that cause toxicity to egg laying organisms. Selenium bioaccumulation in aquatic organisms is primarily the result of trophic transfer through food webs and is poorly predi
Dissolved-Selenium Concentrations and Loads in the Lower Gunnison River Basin, Colorado, as Part of the Selenium Management Program (ver. 5.0, September 2025)
The U.S. Geological Survey (USGS), in cooperation with the Bureau of Reclamation, completed a review of dissolved selenium data collected from the Selenium Management Program network during each water year (WY) in the lower Gunnison River Basin, in western Colorado. The data tables include dissolved
U-Pb zircon data for: The Poncha Pass and Deadman Creek areas, northern Sangre de Cristo Mountains of south-central Colorado
Geologic mapping, characterization of geologic structures, and sampling for geochronology was completed in two areas of the northwestern Sangre de Cristo Mountains from 2011 through 2017. This data release provides the raw analytical data, metadata and sample information for 20 zircon U-Pb age analy
U-Pb detrital zircon data for: lower Paleozoic sedimentary rocks near Silverton, CO USA
This Laser ablation ICPMS U-Pb detrital zircon data set supports mapping and stratigraphic interpretations of the Upper Devonian Ignacio Formation in southwestern Colorado (Silverton area). All samples were collected from a measured stratigraphic section called "Sultan Creek South" located at 37.710
Metabolism of toxic sugars by the bee gut symbiont <i>Gilliamella apicola</i>
Controls on selenium distribution and mobilization in an irrigated shallow groundwater system underlain by Mancos Shale, Uncompahgre River Basin, Colorado, USA
Groundwater Se concentrations ranged from below detection limit (<0.5μgL(-1), and primarily are controlled by high groundwater nitrate concentrations that maintain oxidizing conditions in the aquifer despite low dissolved oxygen concentrations, which indicate nitrate is largely derived from natural
Assessing best management practices for the remediation of selenium in surface water in an irrigated agricultural river valley: sampling, modeling, and multi-criteria decision analysis
The ecological impacts of selenium have been studied for decades and regulatory standards established in an effort to mitigate them. Agricultural activities in regions with high levels of alluvial selenium can lead to in-stream levels that far exceed regulatory limits. Agricultural best management p
Selenium Biofortification and Phytoremediation Phytotechnologies: A Review
The element selenium (Se) is both essential and toxic for most life forms, with a narrow margin between deficiency and toxicity. Phytotechnologies using plants and their associated microbes can address both of these problems. To prevent Se toxicity due to excess environmental Se, plants may be used
Mobilization of selenium from the Mancos Shale and associated soils in the lower Uncompahgre River Basin, Colorado
Dynamics and structure of a native Pieris population in the presence of a non-native, toxic larval host plant
There have been reports of butterflies that oviposit on non-native plants that do not support the development of the larvae, and the fitness cost of this behavior has been estimated in one such case. However, the long-term consequences of this fitness cost for the population dynamics of such butterf
Draft Environmental Impact Statement (Uranium Mill)
Uranium Mill Tailings Remedial Action. 1995.
Gunnison Co, Uranium Tailings Remedial Action Project – 1994
Gunnison County Commission. 1994.
Uranium Mill Tailings Remedial Action Project Site Manager's Report
Sharon Arp and Steven C. Hamp. US Department of Energy. 1993-1995.
Uranium Mining Mill Tailings Remedial Action Project, Information and Briefing Material, 1992
US Department of Energy. 1992.
Uranium Mill Tailings Remedial Action 1992
U.S. Department of Energy. 1992.
Hidden Subsidies in Uranium Mining and Milling
Reprinted by COLORADO OPEN SPACE COUNCIL MINING WORKSHOP "We abuse land because we regard it as a commodity belonging to us. When we see land as a community to which we belong, we may begin to use it with love and respect." Aldo Leopold, A SAND COUNTY ALMANAC The purpose of this paper is to present
Health and Environmental Protection Standards for Uranium and Thorium Mill Tailings
Hazardous Waste Management: Colorado
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DOE News Gunnison Mill Site Demolition to Begin
Demolition of abandoned mill buildings and other structures at the Gunnison, Colorado, Uranium Mill Tailings Remedial Action (UMTRA) Project site will begin today according to U. S. Department of Energy (DOE) Site Manager Don Leske. "The mill site demolition represents the first phase of site remedi