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(b) Limited groundwater was recovered in a monitoring well drilled and constructed by <br />Nuvemco southeast of the Last Chance Mine site. Exhibit G - Water Information details the <br />poor quality of the limited water that was available in monitoring well MMW 1. The well dried <br />up and no subsequent sampling has been possible. Both wells will be monitored for five <br />successive quarters and water sampled if discovered. Exploration drilling within the permit <br />boundary will further evaluate the presence or absence of groundwater and if encountered, a new <br />monitoring well will be constructed. <br />(c) North of Last Chance in the toe of Davis Mesa several wells have been pennitted in <br />the fractured and faulted Chinle and Moenkopi formations. These wells have no connection with <br />the Morrison formation being mined at Last Chance as faulting at the north edge of the mesa <br />vertically separates these wells by several hundred feet. <br />See Appendix J for a tabulation of registered wells in the area, noting that most are dry <br />monitoring wells constructed for the permitting of the proposed Energy Fuels Pinon Ridge Mill. <br />10. Surface Water Control and Containment <br />Surface water runoff from the Last Chance mine drainage area will flow to the detention ponds <br />as illustrated on Figure T-1, Storm Water Controls. A berm will be constructed on the south side <br />of the Waste Rock Areas to prevent run-on from the rising slope to the south, although most of <br />the water will be diverted by ditches on both sides of Montrose County Road DD16. A berm <br />will be constructed around the south and east perimeter of the waste rock pile to direct any <br />potential runoff from the waste rock to a sediment pond constructed in the low lying area north <br />of the office trailer. The CDPHE Stormwater Discharge Permit No. COR-040230 and the Last <br />Chance Mine Stormwater Management Plan are included in Appendix I, Other Agency Permits. <br />A ditch and/or slight berm will be constructed on the up-gradient side of the ore haul road from <br />the portal to the temporary ore stock pile site for drainage control. This will direct all flows from <br />the ore stockpile back into the mine for total containment. <br />11. Surface Water Quality Data <br />(a) Runoff from the Last Chance Mine site flows to several swales draining northwest, <br />north, and northeast from the site. Drainage to the northeast across Davis Mesa reaches a pond <br />within a depression in Section 12, T46N, R18W. Overflow from this depression drains to Wild <br />Steer Canyon, a westerly-flowing ephemeral tributary of the Dolores River. Water use <br />classifications for tributaries of the Dolores River in Montrose and Mesa counties (as designated <br />by the Colorado Water Quality Control Commission) are Aquatic Life Warm 2, Recreation E, <br />and Agriculture. <br />There is no perennial surface water flow from the mine site. Although there is minor snow melt <br />runoff, most flow from the site is the result of occasionally heavy thunderstorms in the summer <br />and early autumn. Some of this flow is captured by stock water ponds associated with local <br />cattle ranching. Wildlife also benefit from storm water flow to stock ponds. There are no other <br />known potential future uses of surface water in the mine area. <br />Last Chance Mine - April 2009 T-5