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vG Ulool <br /> SALT CREEK MINING COMPANY <br /> P.O. Hux 70 <br /> Loma, Colorado 815?4-0070 ~ <br />• (30l)8i8-3(,08 U.i...: <br />g2G27z8 <br /> ~93G <br />r <br />~~ <br /> ~ <br />' <br />N ~ !\ <br /> " <br /> FEB 1992 ~, <br /> N <br /> RECENED <br />~ <br /> <br />February 25, 1992 , <br />~ D9 C~ ~ ~ <br />~ ~ <br /> << ~V <br /> 6~ - 6 <br />8~£1 St:ZLLI'O~ <br /> Mr. William A. Ilolgate, District hlanager <br /> Mine Safety And health Administration <br /> Coal Mine Health and Safety; District 9 <br /> P.O. Box 25367, DFC <br /> Denver, Colorado II0225 <br /> Re: Munger Canyon Mine; 05-03119 <br /> Sealing of Mine Openings <br /> Deat• h1r. Ilolgate; <br /> Salt Creek h1inirtg Company is in the process of evaluating sealing <br />. the Munger Canyon Portals and reclaiming the <br />accordance with 30 CR 75.1711 Salt Creek req mine site. In <br />uests approval of the <br /> method of closing the mine that is described below. <br />Salt Creek intends to close the drift entrances to the mine as <br />prescribed in 30 CFR 75.1717.-2. Specifically, the entries will be <br />backf:i]led for aL least 25 feet with incombustible material. In <br />addition to filling the entrances as prescribed, Salt Creek intends <br />to construct a seal at the inby end of the area that will be <br />baclrfilled. 7'lte seal twill be one of two types, either block or <br />pumped cotrrrete foam. The proposed seal locations are shown on the <br />enclosed sketch of the mine. <br />Dlock seals will be located as shown on the enclosed sketch. 'Phe <br />seal shall be constructed of a double row of cinder blocks. 1'he <br />joicrLs between the blocks shall be mortared. The blocks will be <br />minimally hitched into the rib and floor so that when the entry is <br />bac}stilled, the seal will not be damaged. All areas that are <br />intended for seals have existing posts and crossbars to support the <br />roof. <br />Should Salt Creelr decide to use pumped concrete foam rather than <br />block to build the seals, the seals shall be installed at the same <br />location as the block seals. 1'he pumped foam concrete seal will not <br />be hitched into the roof, rib or floor. The seal will be at least <br />two feet thick. <br />P" 1 <br />r~ <br />~~ . - <br />I v J <br />