2022-06-13_PERMIT FILE - C1980007A (2)

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West Elk Mine 2.04 -56 Rev. 06/05- PR10, 03/06- PR10, 04/06- PR10, 09/07- PR12; 05/22- MR462 Permit Permit Activity Activity Twn. Rng. Sec. Qtr. Qtr. Coordinates Applicant City Use Aquifer Depth Yield Wtr. No. Suffix Code Date 40 160 N/S line E/W line Code Level 92019 14S 91W 08 SW NE 1900N 2000E INDERGARD LAWRENCE GRAND JCTN. stock GW 140 2.00 110 92016 EP 6/7/1977 14S 91W 09 NE SE 2000S 500E INDERGARD LAWRENCE GRAND JCTN. stock GW -- -- -- (1) Based on well permit records obtained directly from a CD purchased from the Colorado State Engineer's Office (Gunnison County, Colorado - 2/2003) 29 permit wells within West Elk Mine permit boundary: 4 wells permitted for domestic uses (3 to mining companies and one to a private individual); all wells owned by MCC and unused 6 wells permitted for stock uses (all 6 permitted to private individuals); 3 permits have expired (EP); 3 remaining wells now owned by MCC and unused 1 well permitted for industrial use (predecessor of MCC) 18 wells permitted for monitoring purposes (all permitted to MCC or its predecessors) Groundwater use in the general area around West Elk Mine is generally confined to shallow wells in the alluvium of the North Fork and its tributaries. There is an existing well permit for a groundwater well completed in the SW¼NE¼, Section 8, T14S, R90W. This well was completed in a localized sandstone unit at a depth of approximately 120-140 feet and yielded approximately 2 gpm on completion. MCC owns this well, which is no longer utilized due to its limited capacity. The Rollins Sandstone was thought to be the source of water for two stock and domestic wells completed along the North Fork near the reclaimed Hawk's Nest East Mine, although these wells (designated 17 and 16) are probably completed above the Rollins Sandstone (Brooks and Ackerman, USGS, 1986). These "Rollins Sandstone wells" are thought to have a surface water connection with the alluvium due to the close proximity of the wells to the river and the lower salinity of the water (Prince and Arrow, 1974). Water levels for these wells indicated a gradient paralleling the North Fork. The relative lack of groundwater within the Mesaverde Formation can be further demonstrated by reviewing information obtained during the drilling of boreholes. Figures 5A through 5F in Section 2.04.6, are stratigraphic cross-sections between drill holes that indicate those intervals within each hole where groundwater was encountered. The general lack of these notations indicates the insignificance of the groundwater quantity and availability within the coal bearing strata. Mayo et al. (1997) developed a conceptual model of groundwater flow in the Book Cliffs and Wasatch Plateau. This model was based on an analysis of physical hydrology, solute and isotopic data, and stratigraphic sequences in the coal district. The analysis included more than 300 stable and radiogenic isotopic compositions of in-mine, spring, and surface samples; hydrographs of more than 300 springs; tens of hydrographs of mine inflows; solute compositions of more than 500 in- mine, spring, and stream waters; and more than 30 monitoring well hydrographs. The data and observations from the West Elk Mine area, which are summarized in the reports contained in Exhibits 18 and 18B (specifically for the E Seam mining in the South of Divide permit area), are consistent with their observations elsewhere, and support the conceptual model of Mayo et al. (1997) when describing the hydrogeologic conditions of the West Elk Mine site. The overall pattern of groundwater flow and surface water-groundwater interactions in the study area can be described by a conceptual model involving both active and inactive groundwater flow regimes. Active groundwater flow systems contain abundant 3H, have excellent hydraulic communication with the surface and thus are dependent on annual recharge events and are affected