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'Y <br />!„~ <br />ANACONDA Minerals Company ~ ~_~ ~- <br />555 Seventeenth Street III III III III IIII III <br />Denver. Colo rxdo 80202 <br />Telephone 303 293 4000 ggg <br />July 11, 1985 ,, .t .L ~ 'r,~ ~=e r9 <br />,; ;~,151,~6 <br />~ ..I I`.a~ ~~~~ <br />Ms. Susan Mowry ,~~ ;~ ivl~1~l6f~ 131V1~1~'' <br />Reclamation Specialist <br />Colorado Mined Land Reclamation Division <br />1313 Sherman Street - <br />Denver, Colorado 80203 ::~=•.~ <br />Dear Susan: <br />- West Elk Coal. Company (WECC) is hereby requesting a minor revision to the <br />Mt. Gunnison Permit C-007-80, issued by the Colorado Mined Land Reclamation <br />Board in July 1981. The revision is being proposed to allow for the <br />drilling of -between 4 and 8 water-monitoring wells in Section 21, T13S, <br />R90W, 6th P. M. These water-monitoring wells will be used to record changes <br />in water quality and quantity which may result from subsidence effects <br />brought about by retreat mining in the subsidence test panel -described in <br />the Application to Revise the Mining Reclamation Plan For the Mt. Gunnison <br />No. 1 Underground Mine. This application proposed to expand the current <br />five-year permit area by 320 acres submitted in November 1984. <br />As you know, two water-monitoring wells, SOM-38-H1 and H2 were installed in <br />1979 over the location of the subsidence test panel. Adequate collection of <br />data has been difficult at times due to apparent obstructions in the wells. <br />Thus, WECC proposes to drill another water-monitoring well, SOM-38-H3 within <br />50 feet of the existing wells in the location shown on the attached map. <br />This hole will be a twin of the existing water-monitoring wells, drilled to <br />a depth of 1000 feet to the top of the F-seam. Water quality and quantity <br />anaylses will be made on the same schedule as for SOM-38-H1 and H2. That <br />is, the well will be monitored monthly for water level and semi-annually for <br />water quality. <br />In addition, to further monitor surface water impacts for our secondary <br />recovery operation .in the subsidence test panel, WECC proposes to drill <br />between three and seven shallow water-monitoring wells. These wells will be <br />drilled to a depth between 50 feet and 100 feet. They too will be located <br />in Section 21, R90W, T13S, 6th P.M. on U.S. National Forest land and within <br />the current Mt. Gunnison five-year permit area. The wells will be randomly <br />spaced in the location shown on the attached map. <br />The drill holes will be cased with 4 inch perforated PVC pipe, gravel-packed <br />and the surface sealed with bentonite clay. <br />ANACONDA M~nenl, Cpmpmy i, , Dnblpn pl Alb nl:c eic~lylECOmpm, <br />AMCO-6D00-A ~e~e~l <br />