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Grand ~sa- ~ III IIIIIIIIIIII ~ <br />Coal Company I III <br />999 <br /> <br />First and Columbia <br />P. O. Box 226 <br />Delta, Colo. 81416 <br />Office: (303) 874-7561 <br />Mine: (303)856-6402 <br />March 15, 1985 <br />Mr. David C. Shelton <br />Colorado Mined Land Reclamation Division <br />1313 Sherman Street <br />423 Centennial Building <br />Denver, Colorado 80203 <br />Subject: Federal Permit CO-0071 <br />Special Condition No. 2 <br />Dear Mr. Shelton: <br /> <br />4 ~ ..,1 <br />- -oc• ~; D~,• V ,-,• <br />Cel:,...r,;, ,; ,,, <br />..; fit: ~„ ~s <br />Special Condition No. 2 of Federal Permit CO-0071 states in part: <br />"the permittee shall develop for regulatory approval a plan of <br />augmentation for flows lost to the surface water system as a <br />result of mine workings inundation. This plan will at a <br />minimum contain volumes of water needed and methods expected <br />to be utilized so as to minimize harm to downstream water <br />users' rights." <br />Table 1 attached shows that 1,222 acre feet would be required to fill the mine <br />void after the permit term expires. This quantity is calculated based on the <br />fact that no production will occur in 1985 and the permit expires October 4, <br />1989. <br />Grand Mesa Coal Company (GMCC) intends an allowing the mine seepage water to <br />fill the mine void. The rate of seepage at the end of the permit term has <br />been estimated to be .17 c.f.s. The current rate of seepage is about .033 <br />c.f.s. Considering these two seepage rates it could take between 10 and 51 <br />years to fill the mine void. <br />GMCC has previously received from the State Water Engineer a well permit for <br />the consumptive use of the current mine seepage .033 c.f.s. GMCC also controls <br />19 shares (.855 c.f.s.), of the Granby Ditch and Reservoir. <br />GMCC has already established a method to inundate the mine workings that does <br />not harm downstream water users' rights. This is by allowing the seepage water <br />