2016-12-23_PERMIT FILE - C1982056A (8)

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District are summarized and presented in Tables 3 and 4 of Exhibit 9A. The average inflow in one panel could range from 65 to 230 gpm and the total inflow in the Eastern Mining District could range from 110 to 601 gpm. The geology of the Eastern Mining District is similar to the previously permitted areas. A syncline axis, oriented northwest-southeast is located in the central section of the mined area. The southeastern edge of the proposed mining is defined by a split in the Wadge Coal Seam. Additional exploration boreholes will be drilled in this area to better define the coal seam composition. The Eastern Mining District area sedimentary strata are not disturbed by any significant faults. The structural and lithologic characteristics of the permit area are depicted on Geologic Cross Sections B-B' (east-west) and D- D' (north-south), Figures 1B and 1A, respectively. These figures are considered confidential. EMD (Panels 2-Right through 6-Right, PR97-04) -_The mine inflow predictions were generated using a different methodology than was used for the EMD. The discussion and calculations are presented in Section 2.05 of this application. The methodology used a mirror-well technique, which should be adequate for predicting inflows into the mine. NORTH MINING DISTRICT (PR99-05 and PR06-07) The mine inflow predictions were generated using a different methodology than was used for the EMD. The discussion and calculations are presented in Section 2.05 of this application. The methodology used a mirror- well technique, which should be adequate for predicting inflows into the mine. NMD (Panels 17-Right through 25-Right, PR03-06 and PR06-07) - The mine inflow predictions were generated using a different methodology than was used for the EMD. The discussion and calculations are presented in Section 2.05.6(3) of this application. The methodology used a mirror-well technique, which should he adequate for predicting inflows into the mine. WESTERN MINING DISTRICT (WMD,Panels 12-Left through 17-Left,PR06-07,TR08-64,PR09-08) Because it falls within the Twentymile Park Basin, the geology of the WMD is similar to the previously permitted areas. The Twentymile Park synclinal axis, oriented NE-SW, is the northern boundary of the WMD, the area is bounded on the east by one of the primary faults (orient NNW to SSE), the western boundary is the Tow Creek Anticline and Hayden Syncline, and the SMD lies along the southern limit of the area. General surface Geology and coal seam structure for all mine areas are shown on Maps 5, and 6 (Confidential), respectively. With the exception of the primary fault that extends through the eastern portion of the WMD, the WMD sedimentary strata are not disturbed by any significant faults. The structural and lithologic characteristics of the permit area are depicted on Geologic Cross Sections B-B' and E-E' (both east-west, and Maps 8 and 9A, Confidential). Under PR06-06, only limited main and sub-main development will occur. Given the limited area that will be developed, Groundwater inflows are expected to be minimal. Prior to actual mining of this area, inflow modeling will be completed and incorporated into the PAP. WOLF CREEK RESERVE (WCR, Rock-Slope Access and Panels WC-7RT through WC-9RT Initial Development, and Development and Mining of Panels WC-4RT through 9RT - TR13-83, PR14-10, and PRI 5-11) The WCR underlies portions of the EMD and NMD, and is part of the same water-table groundwater system, so the associated effects of mining on groundwater in this area will be similar to those previously considered and evaluated for the EMD and NMD. In order to develop and mine the northern (WC-1 IRT through 14RT) and southern (WC-6RT through 4RT and 3RT through IRT) panels of the WCR, TC will need to drain and transfer the water which is currently pooled in the sealed and abandoned overlying workings in the Wadge Seam. TC is currently developing detailed mine dewatering plans, which will be submitted for CDRMS review and approval PR 14-10 2.04-11 03/18/16