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West Elk Mine <br />A water treatment plant at the mine site provides potable water for the operation. The Culligan <br />Multi-Tech 48 water treatment system can treat water at the rate of 62 gpm. Thus, maximum <br />capacity is about 89,280 gallons of treated water per day. The water treatment plant is operated <br />as required by state regulations and under the jurisdiction of the Colorado Department of Public <br />Health and Environment (CDPHE). An as-built construction description of the building housing <br />this system is provided in Exhibit 68. MCC has the capability to expand the water treatment <br />plant, if needed. Capacity can be readily expanded by adding additional components should the <br />need ever arise due to increased needs at the mine. <br />Demand for water at the mine is expected to increase in the future. With the expected 8.2 <br />million tons (plus) per year production at West Elk Mine, MCC conservatively estimates that <br />as much as 300 acre feet per year but a likely maximum of 150 acre feet per year (based on <br />250 work days) of fresh water will be required. Prior to installation of the longwall, annual <br />coal production was 600,000 tons per year. At this rate, water needs were about 65 acre-feet <br />per year. The Annual Hydrology Reports contain specific data on the amount of water <br />consumed annually at the mine since 1982. <br />Tab/e 33 <br />Summary of Mountain Coa/ Company's Water Rights for the West E/k Mine <br />Source of Water Water Rights <br />Mt. Gunnison Pipeline 15.00 cubic feet per second <br />Tony Bear Pipeline 0.9 cubic feet per second <br />Chipmunk Ditch 1.0 cubic feet per second <br />Walter Gallob Ditch 0.75c cubic feet per second <br /> <br />Sedimentation Ponds: <br />MB #1 13.66 acre-feet <br />MB #2 9.61 acre-feet <br />MB-#3 0.23 acre-feet <br /> <br />Freshwater Ponds: <br />FW #1 9.98 acre-feet <br />FW #2' 9.98 acre-feet <br /> <br />Mt. Gunnison Tunnel 0.49 feet per second <br />Notes: 1. These facilities have not yet been constructed <br />2.05-20 Revised June 2005 PRIO; Rev. January 2006; Rev. March 1006; Rev. Apri! 2006 PR10, May 2006 PR10; Rev. January 2009 MR-350 <br />