2011-03-14_REVISION - M1977493 (49)

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CMCDO1458 Climax Mine - Robinson Lake Pump Station Replacement Eagle County 1041 Application Submittal The system design provides three vertical turbine-can pumps (two operating and one standby) to reclaim water through a 21,300-foot long, 24-inch carbon steel and 30-inch HDPE pipeline to a two million gallon mill process water storage tank. Approximately 8,000 feet of 24-inch standard weight carbon steel pipe will be used in the first section (leaving the pump station towards the mill) of the reclaim pipeline in order to withstand the 350 psig pressure. When operating pressure along the pipeline drops below 200 psig, the 30-inch HDPE pipe will be installed for the remainder of the route to discharge into the mill storage tank. Details of the SDR schedule for the HDPE pipe is presented below. The maximum design flow for the Robinson Lake pump station is 10,000 gpm. __ Description Value Robinson Lake Pump Station: _.... ._.._......_..__._._._ -...... __-- - -.---.__._ __...__Pumping capacity 8,670 g..P._? --.--- Pumping capacity (design) 10,000 gpm Pump elevation 10,818 ft Discharge elevation (Mill water tank) ?_-- 11,500 ft _ Conveyance line length -? - 21,260 ft Conve ance line Carbon Steel -_?-- __ 8,760 ft - HDPE SDR 9 --._.._.__..-_.._._..------- - 4,920 ft --- -----41- 0 ft ----- HDPE SDR 11 5,300 ft HDPE SDR 15.5 ......... _-...... _....._._...... _......... _.-. 2,280 ft Pumps -- Number of Pump _s A2 o erating, 1 standby) 3 Head (feet) 800 ft `-_ Type Vertical Turbine Can Flow Rate ...(eachL- --..._...... -- _...-- - --.._._...-.-_ - ...---=- -- 5,000_.gpm---- Motor (HP) 1500 The Robinson Lake Pump Station building is designed as an all steel pre-fabricated building. No potable water or sanitary sewer systems are designed to be included in this building. Heating to the building will be electric radiant heat. The instrumentation and controls for the pumping systems will include emergency shut-off to the pumps and a fire alarm system reporting to the mill operators. The general arrangement and dimensions of the building are shown on Drawing 540-S-ST-101 (Attachment A). The dimensions of the building include a width of nearly 60 feet, length of 126 feet and height of 40 feet. A geotechnical investigation was performed to evaluate the depth to bedrock and assess the bedrock qualities as they relate to foundation excavation and design. r 4