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• A small stock pond is also present near the huildings. The location of the <br />structures and stock pond are shown on Map Exhibit Ii. These are the only <br />permanent structures, other than the mine buildings and facilities, that <br />are on the leased lands. The mine huildings are located off the area where <br />extraction is planned. <br />A recent report nn the vegetative cover indicates that the surface above <br />the planned mined areas consists of [wo major categories, cleared and uncleared <br />lands, The cleared areas, which are redily identifiable on the recent photo- <br />graphs and have been transferred to Map Exhibit II, consist of grazing lands <br />and natural hay fields of wheat grass, needlegrass, bromes, and elk sedge. <br />There are no silvaculture activities. The uncleared areas are covered with <br />oak brush, serviceberry, bitterbush, snowberry, and aspen communities. Much <br />of the uncleared area is steeply sloped valley walls above Trout Creek where <br />the coal seams outcrop. <br />Based on the hydrologic investigation discussed elsewhere in the appli- <br />cation, there are no aquifers, no areas For recharge of acquifere, and no other <br />• identified underground waters above the area where coal extraction is planned, <br />with the possible exception in fault Klock 3. The hydrologic data indicates <br />that the piezometric surface in fault blocks 1 and 2 is projected at an elevation <br />which is below the lowest elevation to be mined in any of the beds. In fault <br />block 3, the piezometric surface could be within or slightly above the Upper <br />I'lnnac]e scam. F.ven so, it was concluded that the mining activities in the <br />llpper Pinnacle and Lower Pinnacle (40' below the Upper Pinnacle) beds in fault <br />block 3 would have a negligible impact on the existing groundwater movement. <br />Therefore, it can also be concluded that any subsidence above [he planned <br />mining areas would have a negligible, if any, impact on the groundwater. <br />tilII157DENCE 1)AMACE POTI~.NT1A1. <br />Extraction of coal by underground mining methods from large areas may <br />be followed by subsidence. lixperience has shown that if subsidence occurs, <br />the time between the mining operations and surface subsidence could bu a fow <br /> <br />r98 <br />4 D. H. EMLING COMPANY <br />