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Yn UI'I ~UU¢rt~Cl II III I IIU l.U U:.lU.lYY9 1115 Y. 4 <br />• j. <br />Sd~ERS~T :; ~I: o <br />,1AN 2 T 19x4 <br />M! N/ N G C O M P A N Y i~•1; <br />~le.Sf~man <br />January 27 , 1994 ~ `~ r 803 2 <br />Mr. William A. Holgate, District lJanager <br />Mine Safety and Health Administration <br />P.O. Box 25367 <br />Denver, CO 60L25-0367 <br />Dear• Mr. Holgate: <br />Re: Sanborn Creek Mine <br />ID #05-04452 <br />Ventilat~.on System and <br />Methane and Duat Control <br />Plan <br />Attached are three maps of the C-Seam section of Sanborn Creek <br />Mine which will be used as a water sump. The maps show the <br />present water level, the water level at the 5680 ft. elevation <br />during filling, and the fnaxiroum water level at the 5890 ft. <br />elevation point. <br />The water lcvel will be maintained at the 5690 elevation point <br />plus or minus two feet. Sump level fluctuations will be <br />controlled by regulating the inflow and/or the outflow of the <br />water. <br />There will be 4 evaluation points est.abliahed on the intake aide <br />of the sump, and 2 evaluetiori points established on the return <br />side of tt,e sump, i.e.; an evaluation point will be established <br />in each entry of the sump area. The evaluation points will be <br />established at the toe of tho water line. Checlt curtains will be <br />set, and maintained, in the cross-cuts between evaluation points <br />to improve point evaluation. <br />The sump area (all evaluatior, points) will be checked in <br />accordance with 30CFR75.364, and the rosultc recorded. <br />Somerset Mining Company is requesting approval of this area for <br />use as a water sump. Your immediate attention in this matter is <br />appreciated. <br />Vrrer''y Truly Yours, <br />~~lJ/~ti PAC ~. (.(J.uCo~t.~ <br />Walter L. Wright <br />Mine,Manager <br />P O. FJOX 535 <br />Sorner:~et. CU 81434 <br /> <br />7901 Sorll~ark, Suile 202 <br />Llttteton, Co N0720 <br />