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West Elk Mine <br />• The sections entitled Mine Water System and Groundwater Quantity Effects provide helpful <br />background information on water management at the mine, the nature of the B East Mains and <br />14SE Headgate fault inflows and the characteristics ofthe sumps. <br />North Fork Water Rights <br />MCC diverts water for in-mine processes and potable uses from the North Fork of the Gunnison <br />River (North Fork) via the Mt. Gunnison Pipeline water right. Approximately 572.1 ac-fr of <br />water were diverted using this water right during WY2001 (MCC, 2002). <br />Because the Mt. Gunnison Pipeline is a relatively junior water right, it is often called out of <br />priority during the late summer and early fall. In WY2001, a call was placed on the North Fork <br />from July 21, 2001 until September 23, 2001 (Colorado State Engineer, 2002). Out-of-priority <br />diversions were augmented using releases from East Beckwith Reservoir (a.k.a. Lost Lake <br />Slough). <br /> <br /> <br />2.05-179 Revised November 2004 PRl0 <br />