Record Display for the EPA National Library Catalog


Main Title Superfund record of decision : Central City-Clear Creek, CO.
CORP Author United States. Environmental Protection Agency.
Publisher U.S. Environmental Protection Agency, Office of Emergency and Remedial Response ; Reproduced by National Technical Information Service,
Year Published 1991
Report Number EPA/ROD-R08-91-055
Stock Number PB92-964406
OCLC Number 32543775
Subjects Hazardous waste sites--Colorado
Additional Subjects Superfund ; Hazardous materials ; Waste disposal ; Remedial action ; Pollution control ; Colorado ; Ground water ; Acid mine drainage ; Mining ; Metals ; Mine wastes ; Tailings ; Water pollution ; Record of Decision ; Gilpin County(Colorado) ; Clear Creek County(Colorado) ; EPA region 8 ; Cleanup operations
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA ROD-R08-91-055 Headquarters Library/Washington,DC 11/13/2009
NTIS  PB92-964406 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 1 volume (various pagings) : illustrations ; 28 cm
The Central City-Clear Creek site is an active mining facility in Central City, Clear Creek and Gilpin counties, Colorado. The site lies within the 400-square mile drainage basin of Clear Creek, which serves as a drinking water source for several municipalities. Presently, six major mine drainage tunnels are thought to be principal discharge sources of acid mine water containing high concentrations of metals to surface waters including Clear Creek and its tributaries. In addition, over 21 mine tailings piles with an estimated total volume of over 2,000,000 cubic yards at numerous locations throughout the site are thought to be major sources of contamination. In response to site contamination, EPA has conducted three removal actions since 1987. The ROD supersedes the remedy provided for OU1 in the 1987 ROD by including active treatment of the Argo Tunnel and delaying a decision on treating the discharge from the Big Five, National and Quartz Hill tunnels, and the Gregory Incline. The primary contaminants of concern affecting the ground water are metals including arsenic, cadmium, chromium, and lead. The selected remedial action for the site is included.
Cover title. "9/30/91." "EPA/ROD-R08-91-055." "September 1991."