2015-03-16_REPORT - C1981010 - Laserfiche WebLink

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019, 020, 021, 022, 023 and 024, respectively. Sites that had flowing water and were sampled during 2014 are Johnson, No Name, East Pyeatt, Oak, Horse and Middle Flume. Some of the data could allow alternative interpretations and some of those interpretations may indicate hydrologic impacts that are significantly different from those presented in this report. 1.1 GROUND -WATER SETTING FOR PERMIT EXTENSION AREA The geologic setting is the same for the permit extension area as that presented in the Trapper Permit. Figure 2.7 -4 in the Trapper Permit presents the structure of the basin in the area of the mine. Structure of the coal seams has been extended to cover the permit extension area. These structure maps show that the typical dip to the north in the northeastern portion of the Trapper permit area is changing to the northwest in Section 28 T6N R90W. This change fits the regional structure change that is shown in Figure 2.7 -4 1.2 GROUND -WATER CONDITIONS FOR PERMIT EXTENSION AREA The structure maps for I and R coal seams were used to aid in the extrapolation of the water -level elevations for the HI and QR aquifers in the permit extension area. The structure map for the H seam was used in the extension of the water -level elevations for the Third White Sandstone because the base of this sandstone is near the top of the H coal. The water -level elevations in the QR aquifer were extended in the permit extension area accounting for the change in the dip of these beds from the north to the northwest. This structure change causes the water level contours to curve to the northeast in the permit extension area resulting in ground -water flow to the northwest instead of the northerly flow that occurs to the west of this area. Similar changes in the flow directions in both the HI and Third White Sandstone aquifers also occur in the permit extension area and to the north of the extension area. Trapper Mining Company 1 -3 2014 Annual Report