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The State Engineer's office was consulted during the course of the. application <br />review. However, no approval of the mitigation plan could be granted by the <br />SEO since the SEO is not authorized by law to approve augmentation plans. <br />Topsoils - Rules 2.04.9, 2.05.3(5), 2.05.4(2)(d), 4.06 <br />Information pertaining to soil resources and their inventory may be found on <br />pages 67 to 69, .Part 2.04 of, Volume 1 and in the Soils Appendix of Volume 9. <br />Information pertaining to topsoil handling and redistribution may be found on <br />pages 50 to 53 and 63•to 67, Part 2.05 of Volume 1. <br />Disturbance at the Orchard Valley Mine commenced in late 1975 and continues to <br />date. Laws pertaining to topsoil salvaging have become more stringent with <br />the enactment of each additional law. The initial development work of the <br />Orchard Valley Mine benches and the storage and loadout areas occurred from <br />October 1975 to mid-1916, prior to the enactment of the Colorado Mined Land <br />Reclamation Act of 1976 and its topsoil salvaging requirements. Due to the <br />steep slopes in these areas, no topsoil was salvaged. Since enactment of the <br />1976 law, topsoil has been salvaged from disturbed areas. <br />Soils within those portions of the permit area which have been or will be <br />disturbed by surface operations and facilities are generally deep, encouraging <br />surface runoff. As a result, the water. erosion hazard is often high. <br />Generally, available water capacities are high, reflecting the potential of <br />these soils to store water for plant use. Topsoil layers at the existing <br />facilities are shallow, rangjng from about two (2) inches to eight (8) inches; <br />surface. textures are generally loams or clay loams with subsoils ranging from <br />clay loams to clays. However, at the Roatcap Creek facilities soils are much <br />deeper, ranging from two (2) feet to four (4) feet in many places. Basaltic <br />cobbles and-stones are common throughout the profile of most soils. The <br />general area is somewhat susceptible to landslides, especially in the steeper <br />topography of the mine bench area and, as such, the continual sloughing of <br />colluvial material 1n this area impairs horizon development. <br />Vegetation Rules 2.04.10. 2.05.4(2)(e). 4.15 <br />Information pertaining to vegetation baseline may be found on pages 70 to 75, <br />Part 2.04 of Volume 1 and in the Vegetation Appendix of Volume 9A. <br />Information pertaining to the revegetation plan and vegetation success <br />criteria may be found on pages 67 to 76, Part 2.05 of Volume 1 and in the <br />Vegetation Appendix of Volume 9A. <br />Disturbance at the Orchard Valley Mine began in late 1975 and continues to <br />date. Initial disturbance occurred prior to any requirements for preparation <br />of vegetation inventories; therefore, portions of this mine site were not <br />surveyed. However, as new areas are proposed to be disturbed, they are first <br />inventoried. <br />Nine vegetation types have been inventoried in the mine permit area, including <br />agriculture, aspen, mixed shrub, mountain meadow, oakbrush, pinon-juniper, <br />sagebrush, sparse herbaceous understory, and riparian. <br />-17- <br />