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Division's Findings on Protection of Hydrologic Balance. Based on the foregoing observations <br />regarding hydrologic impacts, the Division finds that Kaiser has: <br />Minimized disturbance of the hydrologic balance in the mine plan and adjacent areas, and <br />prevented material damage outside the permit area; <br />2. Not caused hydrologic changes that adversely affect the approved post-mining land use in the <br />permit azea; and has restored the essential hydrologic functions of AFV within the permit area <br />and preserved the essential hydrologic functions of the portion of the AVF outside the permit <br />area. This restoration and preservation have been achieved by maintaining the geologic, <br />hydrologic, and biologic characteristics that support the essential hydrologic functions of the <br />AVF. <br />IV. Topsoil{tc u3 "IV. Topsoil} <br />A. Soil resources information and the topsoil management plans have been reviewed by the <br />Division. Baseline soils' information for the approved permit area can be found in Section 2.04, <br />pages 48-55, Volume I. <br />Two soil types are found in the approved permit azea; the Carracas loam and Nunn loam. The <br />Carracas loam is the main soil disturbed on the currently permitted azea. The Carracas loam consists <br />of a surface horizon varying from 0 to 4 inches thick. This horizon is underlain by a subsurface <br />sandy loam or sandy clay loam ranging from 4 to 14 inches in thickness. There have been no <br />potential management problems identified with this soil unit and it is considered a good plant growth <br />medium. <br />On May 7, 1981, the Division approved a technical revision to disturb an additiona19.71 acres to <br />construct a coal handling facility (crusher load-out), bathhouse, fuel storage azea, and parking area <br />along the southwestern edge of the existing permit azea. The majority of this area was covered by <br />the Nunn loam, which has a clay loam to loamy surface soil, six to eight inches thick, over a clay <br />loam to sandy loam subsoil. This soil type is characteristic of the alluvial valley floor along <br />Stollsteimer Creek. The depth of this soil exceeded 72 inches at the sampling location. W ithin this <br />revision azea, 2.4 feet of soil was removed and later replaced. On the remainder of the currently <br />permitted area, the operator salvaged and replaced an average of 6 inches of soil material. <br />A separate study was done by Maziah Associates on the soil resources of the Federal Lease Area <br />(August 1983). This study identified four soil types, including variants of the previously described <br />Nunn and Carracas loamy, a rock outcrop complex, and a Celacy vaziant loam. The rock outcrop <br />complex provides no usable soil material. The Celacy loam at the sample site contained a 3-inch <br />thickness of the A horizon, 8 inches of B21 t and B22t horizons, and 7 inches of C horizon. All of <br />this loam material was considered suitable for topsoil stripping. <br />V. Sealing of Drilled Holes and Underground Openings{tc u3 "V. Sealing of Drilled Holes <br />and Underground Openings} <br />A. The Division will require that each hole, well or other underground opening be capped, <br />14 <br />