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- - ~ ~~ • • iii iiiiiiiiiiiiiiii <br />GREG LEWICKI AND ASSOCIATES e~~IC~~~ <br />DEC 1 5 1992 ~ 645 Court Place <br />Suite 309 <br />Denver, Colorado 80202 <br />UI V/,, Phone/FAX (3031 629-9335 <br />December 14, 1992 MINER ~lOr~ Or <br />ALS d GEGL`; <br />Harry Ranney <br />Mined Land Reclamation Division <br />1313 Sherman Street 2nd Floor <br />Denver, CO 80203 <br />Re Coal Gulch Mine Completeness <br />Dear Harry: <br />This letter answers your letter of November 18, 1992 regarding <br />the hydrologic issues at the proposed mine. Enclosed is a revised <br />Exhibit 7 of the Coal Gulch Mine Permit Application. Pennsylvania <br />west Coal Corporation commits to two new drill holes as shown on <br />the Exhibit. The hole within the permit area (Hole 92-1) will be <br />first cored for roof, floor and coal material, then geophysically <br />logged for gamma, resistivity and density. A double completion <br />well will then be installed which will allow pump tests and <br />ongoing water quality analysis to be conducted on the Cliff House <br />Sandstone and the Menefee Formation. Its location near the permit <br />boundary should prevent interruption at a later date. <br />The second hole (Hole 92-2) will be placed near Highway 160 and <br />in the direction of future mining. This hole will also gather <br />roof, floor and coal material for geochemical analysis and will <br />be completed in the Point Lookout Sandstone for pump tests and <br />ongoing testing of the water in the Formation. <br />The hole locations have been selected to provide the best <br />compromise for gathering needed data on the geochemistry and <br />hydrology, allowing good access on existing roads and permitting <br />data collection in the long term since the locations will not be <br />disrupted by retreat mining. <br />All geochemistry analysis of the roof and floor materials will be <br />according to those parameters listed in the November 18 letter <br />plus neutralization capacity and ~ acidity. The coal analysis <br />will include the analysis of pyrite, marcasite and sulphur <br />content, in addition to the following elements: <br />arsenic manganese <br />boron mercury <br />cadmium molybdenum <br />