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5 <br />4.15.10(3); For mine support facilities located within areas where pre-mining land use was <br />industrial or commercial, and the approved post-mining land use is industrial or <br />commercial, the vegetation requirement of 4.15.10(2) may be waived if requested in <br />writing by the landowner, and if the Division determines that revegetation is not <br />necessary to controi erosion. <br />4.18(5)(k); Where the primary land use is to be residential, public service, or industrial <br />land use, intersperse reclaimed lands with greenbelts utilizing species of grass, shrubs and <br />trees as useful as food and cover for birds and small animals, unless such greenbelts are <br />inconsistent with the approved post-mining land use. <br />III. OBSERVATIONS AND FINDINGS <br />PHASE II and PHASE III <br />The Northgate loadout consists of a relatively flat 2.82 acres of land adjacent to Colorado <br />Highway 125, and abutting the Wyoming and Colorado Railroad spur. Approximately two feet <br />of elevation change occurs over the permit area. The length of the permit area is 1500 feet. <br />This equates to a 0.13% grade. Although a gentle slough runs adjacent to the southwestern <br />permit corner, no drainages were disturbed, nor were any required to be reestablished. Due to <br />the relatively flat area and lack of drainages within the permit area, the only runoff from the site <br />would be from that falling in the form of precipitation on the permit area. Soils present within <br />the loadout permit area consist of Bangston and Tine series. These two soil series are typified <br />by fine sand and sandy loam textured soils. Soil permeability for both soil series is rapid with <br />low available water holding capacity. Wind erosion hazard is severe for the Bangston fine sand <br />and Tine sandy loam. Very little runoff is likely to occur from this site of 2.82 acres with a <br />relatively flat grade and highly permeable soils. <br />Regrading, topsoil replacement and seeding at the loadout occurred in 1988. Division records <br />indicate that the topsoil depth at the loadout was confirmed with the excavation of two holes <br />on November 7, 1990. The two holes sampled at the loadout had topsoil thicknesses of 18 <br />inches and 24 inches. Topsoil thickness was determined by color or textural change in the sample <br />holes. The permit required a replacement thickness of 12 inches. <br />The Northgate IAadout has been graded to include a small area exemption. No sediment <br />structures exist on the site. The site is generally flat with an elevation gain of less than two feet. <br />All precipitation will remain on site. Twenty-six inspections were conducted at the loadout <br />between 1991 through 1995. These reports were reviewed and found that no erosional features, <br />i.e. no rills, gullies or blowouts, were reported at the loadout. Although four to six inches of <br />snow covered the loadout site during the January 22, 1996, bond reiease inspection, no erosional <br />features were noted during the inspection. <br />