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• Trapper Mine made an inventory of wells down gradient and within one mile of the proposed permit <br />area. As shown on Map M-31, 21 wells fall wtthin this area. However, based on all existing <br />information, only four wells may possibly be connected with the Third White Sandstone. The four <br />wells are W-1406-78, 93848, W-624-74 and 80998. From the specific well completion data (Tables <br />2.7-22a and 2.7-22b), tt has been determined that two of the four wells have the potential to be <br />impacted by future mining operations. These wells are W-624-74 and 80998. <br />Well 1406-78 was not constructed as outlined in the water rights filing. Map M31 shows the correct <br />location of this well. Originally this well was considered as a separate well from well permit No. <br />91071, when in actuality they are the same well with dual numbers. The well is completed and the <br />water rights decreed to Mr. Francis Lux of Craig. The Lux well is located at Mr. Lux's house and not <br />to the south as originally thought. Based on the well depth (200 feet) and a structure map on the <br />base of the I coal seam (Appendix ~ tt has been determined that this well is completed in the First <br />White Sandstone, not the Third as originally thought. <br />Well 93848 will likely not be impacted by mining operations that occurred in Browning and CoR pits, <br />ending in 1993. The strike and dip of the HI coal seams indicates that well 93848 is completed above <br />• the H coal seam. Therefore, tt is likely that this well will not have direct communication with ground <br />water that flows through the backfill aquifer in the Browning and Cott pits. In the attemative, assuming <br />good contact between the HI backfill area and well 93848, an estimated travel time of 29 years was <br />obtained. A gradient of 0.067 ft/ft was obtained for the 1996 HI aquifer water-level elevation map in <br />this area and the use of an average permeability of 0.5 ft/day along with an effective porosity of 0.1, <br />were used to obtain this travel time over the 3,600 foot distance. <br />The potential to affect water rights for the MacNamara Ditches is dependent on impacts to the water <br />source, well CH-2259 (Map M-31). This well was constructed to provide irrigation, stockwater and <br />water for domestic use to the <br />• 4-z2sa MAY 1 3 1998 <br />