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process water return through the Ten Mile Tunnel as discussed in Section 5.2.1. Thus, it is both <br /> an EPF and a potential source of contamination. During periods of active operation, process and <br /> seepage/drain waters are mixed in Robinson Reservoir and pumped back into the industrial <br /> process water circuit from the pump station directly to the industrial water storage tanks located <br /> adjacent to the mill building (Appendix E and Section 5.1.1). During periods of cessation of <br /> activity in the mill, mixed waters are pumped back through the process water tanks to the <br /> process water circuit for ultimate delivery to the water treatment and discharge system. <br /> The Robinson pump station is located just below the earthfill Robinson Dam. In order to deliver <br /> adequate water to the process water tanks and circuit, five 3000 gpm capacity pumps (Nos. <br /> 1,3,4,5,6) are located at the pump station. When all five pumps are in operation, each operates at <br /> 2600 gpm, thus providing approximately 13,000 gpm to the process water circuit. During <br /> typical operations, 3 to 4.5 pumps are running ar any one time. At least one pump is maintained <br /> at maximum pumping rate during the winter period to prevent freezing of the piping system. <br /> Additional details regarding this system are found in Appendix E. Information regarding system <br /> alarms at the Robinson pump station is located in Section 5.4.2. <br /> Eagle Park Reservoir and Dam: The Eagle Park Reservoir acts as the last catchment basin on <br /> the Climax property in the upper Eagle River watershed. Even though this reservoir, as <br /> discussed, is being converted to store fresh water, it will remain in place to block and contain any <br /> accidental release upstream from Robinson Reservoir and from the Robinson tailing <br /> impoundment above that facility. The Eagle Park Dam, similar in design and construction to the <br /> Robinson Dam, is keyed to bedrock and provides credible stability to the entire system. <br /> Eagle Park Reservoir Seepage Collection and Pump Station: The final EPF in the Eagle River <br /> watershed which protects the environment of the Eagle River beyond and below the Climax <br /> boundary is the Eagle Park pump station and associated seepage collection system. This EPF is <br /> located just below the Eagle Park Dam and consists of a seep water collection pond and two <br /> pumps in the adjoining enclosed pumphouse to return seepage to the upstream Robinson <br /> Reservoir. Located directly below the pumphouse is a second, smaller seepage collection pond <br /> which acts as a back-up to collect additional seepage. This second pond supports a small pump <br /> which returns seepage back to the first collection pond. <br /> While the reservoir will be cleaned of tailing sediment and contaminated water prior to its <br /> conversion to fresh water storage, seepage collection and return will continue until such time that <br /> seep water meets Colorado Water Quality Standards for discharge into this segment of the Eagle <br /> River. <br /> 19 <br />