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r• The inventory of renewable resource lands listed the <br />`` following land use types: <br />Rangeland <br />Cropland <br />Residential land <br />Wildlife habitat <br />Alluvial valley floor <br />Surface water resources <br />Subsurface water resources <br />Undeveloped land constitutes the majority of the present and <br />reasonably foreseeable land use within and adjacent to the <br />proposed permit area. Cropland, residential land and alluvial <br />valley floor land use areas are located outside the area of <br />influence of mining-related surface subsidence. Only undeveloped <br />land, rangeland, wildlife habitat, surface water resources and <br />subsurface water resources are located within areas projected to <br />be subjected to mining-related subsidence. <br />Predictions of maximum surface subsidence, overburden effects <br />of subsidence, angle of draw and areal extent of surface <br />• subsidence were developed based on the proposed 5-year mining <br />plan. This analysis of subsidence utilized the existing, <br />site-specific data on the mine plan as well as the geologic, <br />hydrologic and topographic framework. Available pitching seam <br />subsidence data in the literature was utilized in conjunction with <br />subsidence data for the western United States. The subsidence <br />predictions developed for the Coal Ridge No. 1 Mine are designed <br />to provide conservative upper limits for maximum subsidence and <br />angles of draw. <br />Based on the available data, the 5-year mining plan will <br />produce sub-critical subsidence conditions. A maximum surface <br />subsidence of 14 ft may occur, based on a maximum extraction <br />height of 40 ft. <br />The distribution of subsidence effects in the overburden is <br />not expected to differ significantly from that encountered above <br />flat-lying coal seams. Major disruption of the overburden is <br />expected to occur only up to about 120 ft above the mining <br />• horizon, based on the anticipated 40 ft extraction height. <br />The angle of draw will be asyemmetrical with respect to the <br />mined-out area. The angle of draw should decrease in magnitude on <br />the up-dip (rise) side of the mined-out area and increase in <br />page 2 <br />