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I-Soils <br />scattered areas along major stream channels in Adams County. This soil is very shallow loamy <br />sand or sandy loam surface layer over gravel and sand. Slopes vary widely from 1 to 80 percent. <br />These soils are generally too steep, too shallow or too unstable for cultivation or good grass <br />management (USDA 1974). <br />Dacona Loam (DaA) <br />There are no Dacona loam soils within the Expansion Area. The Dacona loam soils shown on <br />Exhibit I-I are located along the eastern portion of the existing permitted mine area. Dacona <br />loam soils are well-drained, nearly level soil on slopes of 0 to I percent, overlying sandy and <br />gravelly alluvial materials (USDA 1974). Most of the Dacona soils at Worthing Pit has been <br />stripped and stockpiled. Prior to mining, the surface soil and subsoil layer had a depth from 8 to <br />20 inches to calcareous material. Dacona surface and subsurface sails contain 5 to 15 percent <br />gravel and have a saltd and gravel layer at depths between 20 and 40 inches. Prior to historic <br />mining activities at the site, much of this soil was cultivated and irrigated. <br />Wet Alluvial Land (Wt) <br />There are some soils classified as wet alluvial land within the Expansion Area South as shown on <br />Exhibit I-I. Prior to milting at the Worthing Pit, much of the soil within the permitted area was <br />classified as wet alluvial land (USDA 1974). Wet alluvial land is variable in texture with <br />stratified layers of silt, loam, and clay. The stratified layers are generally less than 6 inches thick <br />altd are underlain by sand and gravel at depths up to 3 feet (USDA 1974). These soils occurs olt <br />nearly level bottom lands next to stream channel throughout the county and is wet most of the <br />year. Natural fertility is moderate to good (USDA 1974). <br />Arent, Earthen Dam (AED) <br />There are currently no areas classified as Arent, earthen dam at the Expansion Area. The area <br />designated on Exhibit I-1 as Arent, earthen dam is the existing bank stabilization adjacent to the <br />South Platte River. This bank stabilization was previously constructed at the Worthing Pit under a <br />Technical Revision (TR-1) in cooperation with UDFCD. <br />Loamy Alluvial Land, Gravelly Substratum (Lv) <br />The southeastern portion of the Expansion Area South has soils classified as sandy land as shown <br />on Exhibit I-1. Loamy alluvial lands occur as small areas within major drainageways and are a <br />principal source of gravel (USDA 1974). Loamy alluvial land is shallow and stratified. Some of <br />this land will support native grasses. <br />Sandy Alluvial Laud (Sm) <br />There is one small area adjacent to the South Platte River on the southwestern portion of the <br />Expansion Area South with soils classified as sandy alluvial land as shown on Exhibit I-1. Tltis <br />soil consists of unstable accumulation of gravelly and sandy alluvium adjacent to beds of streams <br />in the most of the eastern portion of Adams County. Sandy alluvial land is coarser than wet <br />alluvial land and is usually either barren or has only sparse cover of weeds (USDA 1974). <br />1898-Frei 1 l2 Exhibits_(4.20.05).dac I-2 <br />