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359, ECONOMIC GEOLOGY OF THE CENTRAL CITY DISTRICT, GILPIN COUNTY, <br /> COLORADO, Sims, P. K. Drake, A. A., and Tooker, E. W., 1963. <br /> Hydraulic conductivity for the undisturbed rock types present at the site, in-situ before mining, <br /> ranges from 10-2— 10+2 gallons per day per square foot(as reported by Freeze and Cherry <br /> (1979)) due to joints and fractures in the rock. The existence of the underground mine <br /> workings provide a direct hydraulic conduit for groundwater beneath the site. <br /> The Argo Tunnel, the major drainage for the area, lies approx. 1,500 feet below the site. The <br /> Argo Tunnel drainage is monitored, collected, and treated at the Argo Tunnel Treatment <br /> Facility located in Idaho Springs. This tunnel was constructed in the early 1900's to access and <br /> drain the mines in this vicinity. The portal is located near the center of Idaho Springs. <br /> Baseline groundwater quality is monitored at the Argo Tunnel by the US EPA and the CDPHE. <br /> The proposed affected area currently does not produce any surface discharge and we do not <br /> expect discharge will result from the proposed operation. It must be remembered that the <br /> dump is being removed and the site is being reclaimed. <br /> (d) a wildlife statement prepared by the Colorado Division of Wildlife (DONS ... is required <br /> for 110d Limited Impact Operations. The Operator/Applicant may contact the local <br /> Colorado Division of Wildlife (DOT) representative to verify that no critical or important <br /> wildlife habitats or wildlife species will be impacted by the proposed operation. <br /> We have requested a wildlife statement from the Colorado Division of Parks and Wildlife. <br /> 31 <br />