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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 275 <br />Denver, Colorado 80203 <br />Plrone: (303) 8663567 <br />FAX: (303) 832.8106 <br />17 April 2006 <br />COLORADO <br />DIVISION O F <br />MINERALS <br />EOLOGY <br />sal owe, <br />Governor <br />Mr. George Patterson Russell George <br />Kett Coal Company, Marr Mine Executive Director <br />P.O. Box 459 Ronald w. Gnany <br />Florence CO 80480 Division Director <br />Natural Resource TNSTee <br />Re: Marr Mine (C-1980-006) extension; 2005 Annual Hydrology Report <br />Deaz Mr. Patterson: <br />The Division has received and reviewed the 2005 annual hydrology report for Kerr Coal <br />Company. Below is a review of the report covering point-by-point the "probable <br />hydrologic consequences" section (PHC) of the permit application package (PAP). <br />1. The mine will experience increased runoff and erosion during mining. <br />The mine is in the reclamation phase, and there is no longer any evidence of <br />increased runoff or erosion. The sediment ponds have discharged very little over <br />the last several years. The lack of discharge probably is caused somewhat by <br />drought conditions that have affected the area during that period, but probably <br />also results from the minimized runoff as a result of revegetation of the disturbed <br />azeas. The prediction in the PHC appears to be accurate that runoff was greater <br />during the period of mining and has diminished since reclamation and <br />revegetation has progressed. <br />2. There will be increased sediment load in drainages within the mine plan area during <br />mining. <br />This is no longer relevant since mining has ceased and reclamation has <br />progressed. <br />3. There will be increased salt loading in streams draining the mine plan area. <br />There has been very little drainage through the sediment ponds in the drainages <br />from the mine plan area. Since mining ceased and reclamation has progressed, <br />the salt content in the surface water in the ponds has been at baseline levels, so <br />increased salt loading is not occurring in streams. <br />Office of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mines Geological Survey <br />