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Somerset Mining Company Permit Revision No. 2 Preliminary Adequacy Review Comments Application Package At the end of the fourth paragraph on page 2.04-52, a reference is made to page 2.05-50xvi. This should be a reference to page 2.04-50xvi. 2. The beginning of Section 2.05.6(3)(b)(iv) is not designated in the permit revision. Please insert this indicator. 3. In the first paragraph on page 2.05-48, the (v) should be (vii) and be moved below Section (vi). Section (v) is not addressed in the permit revision application. Operations 4. Are there any plans for additional ventilation facilities to accommodate the larger mine area? If so, where and when will they be constructed? 5. Pursuant to Rule 4.11.3, please submit a letter from the Mine Safety and Health Administration that indicates they approve the underground storage of coal mine waste in the Sanborn Creek Mine and Sanborn East Tract. Hvdrology 6. Page 2.04-25, paragraph five, contains an apparent mistake. The existing text states that the "Sanborn East Tract overlies the Hawks Nest Mine." I believe the opposite is actually true. 7. The Somerset Mine did not update the mine inflow predictions for the new area. The inflow calculations on page 2.04-39iv do not account for the increased inflows that may be encountered with the additional mining of the East Tract. Current predictions are for the mine to have inflows from 200 gpm to 237 gpm. Since the length of the mine will increase by 157 percent (measured along the North Fork of the Gunnison River), the amount of inflo~•~ car, be expected to increase by the same amount. (a) The Somerset Mine should revise the calculations on page 2.04-39iv to show the additional inflow from the proposed additional area. (b) Pages 2.04-39 and 2.05-46iii should be revised to clarify that mine pumping will be monitored, with records kept on site, and reported to the Division quarterly and with the Annual Hydrology reports. For the AHR, the estimated inflows over time should be plotted on a graph with the actual inflows. (c> The Somerset Mine should apply to the State Engineers Office for a well permit for beneficial use of the mine inflows or verify that water, other than that obtained through the water right specified on page 2.04-53ii (1.8 CFS), will not be used by Somerset Mining Company.