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i• <br />° The specific percentage of clay or sand allowed will depend upon clay mineralogy, organic matter <br />content, consistence, soil lift, spoil characteristics, and size of sand fraction. <br />s These values may vary depending upon the plant species proposed for revegetation in specific <br />locations (e.g., a soil with a high coarse fragment content throughout its profile maybe completely <br />salvaged if used for rangeland versus cropland postmine land use). <br />These suitability evaluations, based on averages across the study area, were used for topsoil <br />volume determinations presented in the Topsoil Management Plan section of Section 2.05.4(2)(d), <br />Topsoil (Redistribution). The number of profiles on which these averages are based is noted in the <br />Soil Profile descriptions range of characteristics. The recommended topsoil salvage depths for <br />each map unit are weighted averages of each major component of the map unit (those listed in the <br />map unit name -for both consociations and complexes) as well as major soil inclusions as <br />presented within the map units. <br />• Results/Discussion <br />Prime Farmland Determination -1988 and 1998 <br />The Norwood office of the NRCS has provided W FC with documentation that list the definitions and <br />criteria for categorizing soils as prime farmland, see Attachment 2.04.9-4 and Attachment 2.04.9-5. <br />These documents list the standards set by both the U.S. Department of Agriculture, Natural <br />Resource Conservation Service and the State of Colorado, Natural Resource Conservation <br />Service. Peabody Coal Company and Intermountain Resource Inventories Inc. conducted soil <br />surveys and the results can be found in Map 2.04.9-1, Attachment 2.04.9-1, Attachment 2.04.9-2, <br />and Attachment 2.04.9-3. Soil type 70B and D706 lists Barx soil as a major component and Barx <br />as a secondary component (30 percent of map unit) in 98E on Map 2.04.9-1. Banc soil is listed as <br />a prime farmland soil in San Miguel County if the soil is irrigated by an adequate and dependable <br />water supply. A letter dated October 14, 1992 (Attachment 2.04.9-6) from the Norwood NRCS <br />representative states there is no prime farmland in this location because Banc soil does not have <br />an adequate or dependable water supplyfor irrigation. Soil type 706 and D706 were covered under <br />• <br />(Revised Mann 2oos> 2.04.9-14 <br />