Case study of site characterization efforts at an abandoned hard rock mine and mill site in central Colorado.
Shea-Albin-V; Miller-N; Williams-E
Abstract Book, U.S. Department of the Interior Conference on the Environment and Safety, April 24-28, 1995. Washington, DC: U.S. Bureau of Mines, 1995 Apr; :45
The U.S. Bureau of Mines (USBM) performed geophysical surveys and hydrologic tracers tests to identify and map sources and pathways of subsurface, metal-bearing water plumes at the abandoned Mary Murphy Mine and Mill site located along Chalk Creek near St. Elmo, Colorado. The site is the target of a cooperative effort by the Colorado Division of Minerals and Geology (CDMG), EPA Region VIII, US Forest Service, and USBM to characterize and remediate a NonPoint Source pollution site. The Mary Murphy site is the source for increased metals loadings during spring runoff periods responsible for fingerling trout kills at a State rearing unit using Chalk Creek for source water. The Bureau has performed dye tracer tests in attempt to verify the existence of a mine pool and its connection with the subsurface contaminant plume at the mill site, conductive tracer tests to map pathways of contaminant flow through a bedrock fracture system at the mill site, and geophysical surveys under high-flow and low-flow conditions to map the extent of the contaminant flow through and adjacent to the tailings pile at the mill site. Results of this research will be presented as a case study.
Case-studies; Rock-mechanics; Milling-industry; Mine-shafts; Mining-industry; Water-analysis; Environmental-hazards; Environmental-factors; Hazardous-waste-cleanup; Hazardous-materials
Conference/Symposia Proceedings; Abstract
U.S. Bureau of Mines