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• 6.0 Mine Water Information <br />Elk Creek Mine Water <br />The water utilized in the mine continues to be all imported from the alluvial water supply well <br />located neaz the North Fork of the Gunnison River per the OMLLC water rights. Water that is <br />collected and routed to the underground Elk Creek mine sump generally comes from a number of <br />sources, including overspray on mining equipment and beltlines for dust control, motor cooling <br />and general leaks and spillage, etc. <br />During July, 2005 a thermal event occurred in the ls` West Panel gob. Control of the event was <br />facilitated, in part, by pumping of water into the azea for cooling purposes. Subsequently, in late <br />2005, it was observed that the sealed 4 West and 5 West gate road azeas were generating <br />approximately 14 gpm and 12 gpm of water respectively from behind the mine seals. The water <br />was eventually routed to the mine sump. We believed that the source of water draining from <br />these two sealed gate roads is the water pumped into the area eazlier in the year, working its way <br />down gradient to these two low points in the mine. <br />During 2006, the two seals noted above plus a third seal located in 4 West and 5 West panel gob <br />flowed a combined 17.2 gpm. All flows aze collected and eventually routed to the mine sump. <br />In addition, a lazge perched water zone opened up in the west end of 10 West and flowed into the <br />gate road. It was also collected and pumped to the mine sump. By the end of 2006, 10 west <br />• flows had greatly diminished to where the entire flow is now pumped just 10 minutes a day to <br />D2B2. <br />See the D2B and D2B2 well discussion above for information regazding the transfer of collected <br />Elk Creek mine sump water to the abandoned Somerset B/C seam workings. <br />Otherwise, the groundwater encountered in the mine is fairly minimal and randomly distributed. <br />Perched water bearing zones aze sometimes encountered (as expected) but they seem to dewater <br />fairly quickly. <br />Outfall O1 I -Sanborn Creek Mine Water Dischaz2e <br />Outfall 011 was the OMLLC -CDPS mine water discharge point from Sanborn Creek Mine that <br />dischazged into Sanborn Creek <br />The Sanborn Creek Mine water drainage system was decommissioned on May 21, 2003. Since <br />the mine completed the last panel, the underground hazdwaze was removed and the entries were <br />sealed in accordance with MSHA requirements. <br />During 2004, CDMG approved PAP TR-45 which removed Outfa11011 as a monitoring point. <br />Outfa11015 -Elk Creek Mine Water Dischazee <br />• Outfa11015 is a CDPS mine water discharge point for the Elk Creek Mine. The mine water <br />dischazge point provides for the discharge of mine water to Elk Creek. The Outfa11015 has <br />never dischazged. <br />16 <br />