Laserfiche WebLink
,.~ ~.. <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone; (303) 866-3567 <br />fAX: (303) 832-8106 <br />January 30, 2002 <br />~~ <br />DIVISION OF <br />MINERALS <br />GEOLOGY <br />RECLAMATION <br />HINING•SAFETY <br />Mr. Karl Koehler Bill Owens <br /> Governor <br />Senior Environmental Engineer Greg e. walcner <br />Trapper Mining Inc. exec°°ve Do-ector <br />P. ~. BOX 187 Michael B. Long <br /> Division Director <br />Craig, Colorado 81626 <br />Re: Trapper Mining Inc., Pemut No. C-81-010, Lippard Spring No. 1 <br />Dear Mr. Koehler: <br />The Division has reviewed your letter of January 18, 2002 and its accompanying cross-section. We <br />have the following comments. <br />1) The letter and cross-section adequately demonstrate that the Lippazd Spring No. 1 is <br />stratigraphically separated from the Browning and Colt pits. <br />2) It is not clear in the letter and cross-section exactly how the stratigraphic separation results in <br />hydraulic isolation of the spring from the pits. At depths of a few hundred feet coal seams can <br />function as aquifers thus allowing vertical, cross-stratal flow of ground water. Are there <br />lithologies in the ls` White - Q-seam stratigraphic sequence that would act as aquicludes and <br />prevent cross-stratal flow of ground water? If so, then please add them to the cross-section. If <br />there aze none, then please explain what would prevent cross-stratal flow. <br />3) Please identify in the cross-section the direction of ground water flow and how you determined <br />that direction. <br />4) Please remove the gridlines from the cross-section so the stratigraphy stands out. <br />If you have any questions, please contact me. <br />Sincerely, <br />/ drn /~-~ <br />Tom Kaldenbach <br />Environmental Protection Specialist <br />cc: Janet Binns, Dan Hernandez, DMG <br />Mr. and Mrs. Francis Lux <br />