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CM0001457 <br />Climax Mine - Robinson Lake Pump Station Replacement <br />Eagle County 1041 Application Submittal <br />Robinson Lake also captures impacted water flowing as a seep from the toe of the No. 1 Dam, one of two <br />tailings dams that are part of the Robinson Lake Tailing Storage Facility (TSF). The replacement pump <br />station will have a design capacity of 10,000 gallons per minute (gpm). The existing pipeline alignment <br />was routed to the south of Robinson Lake, much of it above the Chalk Mountain interceptor ditch. <br />Portions of this existing pipeline, which in some areas is wood-stave pipe, have previously been <br />abandoned. The alignment for the replacement pipeline has been selected to stay within the process <br />water management area (beneath the interceptor ditch), and follow existing on-site access roads avoiding <br />previously undisturbed or revegetated areas. <br />The Robinson Lake Pump Station is an integral component of the Climax water treatment system. <br />Impacted surface water from the mine site is collected and conveyed to the new Sludge Densification <br />Plant, where it is treated through lime neutralization and discharged to the Tenmile tailing impoundment. <br />Effluent from the Tenmile impoundment, in excess of water recirculated for process water re-use, is <br />decanted and transferred to the Mayflower tailing impoundment for additional treatment and settling <br />before being discharged to Tenmile Creek. <br />• <br />All construction activity will take place on Climax property in areas several miles from any existing <br />residential or commercial development within Eagle County. Access to the Project will be provided by an <br />existing access road from the east (from Highway 91), no new access roads will be required for this <br />Project. Road access to the facility is under the control of the Climax Molybdenum Company. <br />As indicated on Figure 1, Robinson Lake is located within Eagle County on Climax Mine property west of <br />the Robinson Tailing Pond and southeast of Eagle Park Reservoir. The new pump station will be located <br />adjacent to the existing Robinson Lake Pump Station and the pipeline will be installed adjacent to the <br />existing access road towards the mill (Figure 2). The following preliminary engineering drawings are <br />provided as Attachment A to present additional details regarding the construction of the facility: <br />Drawing No. 540-C-SK-035 Robinson Lake Pump Station General Plan <br />Drawing No. 540-GA-105 General Arrangement - Reclaim Water System, <br />Robinson Lake Pump Station Plan View <br />Drawing No. 540-S-ST101 Robinson Lake Pump Station - Steel Plans, Sections & <br />Detail <br />Robinson Lake Pump Station Design Criteria <br />The design of the Robinson Lake reclaim water pump system is based on using the existing outlet pipe <br />from the Robinson Lake Reservoir. A new pump station will be built near the original pump station site, <br />as shown in plan and elevation view on the attached Drawings. <br />3 <br />0