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62 <br />TAB 9 <br />. ATTACHf~2dT 9-1 <br />TOPSOIL MANAGEMENT PLAN AfID SCHEDULE <br />P]UCLA MINE, MONTI3~SE CQJ[aPY, COLORADO <br />I. PRIME FARMLAND - REQUEST' FOR NEGATIVE DE'I~RMiNATION <br />OF NON-DESIGNATID LAND <br />Based upon the U.S. Soil Conservation Service criteria and the <br />historic use criterion listed >r the Surface Coal hlining ard <br />Reclamation Operations, Permanent Regulatory Program, 30 CFR <br />Chapter VII, §779.27, Prime Farmlarr] Investigations and <br />§780.23, Reclamation Plan, Postrnining Land Uses, prime farmland <br />does not exist on the proposed Nucla permit area (see Table 9-1, <br />Surface Soil and Subsoil Prime Farmland Negative Determination <br />and the respective letters from the Soil Conservation Service). <br />• All six (6) soil map units listed in the Nucla soil survey <br />are scheduled for mine disturbance. The following is a summary <br />of negative criteria for determining prime farmlands for each <br />soil mapping unit. <br />PERSAYO SAfIDY CLAY If.]AM - UNIT I;9904, 10-20~ SLOPES. The Persayo <br />soil map unit is not designated prime farmlarx3 by the USDA Soil <br />Conservation Service. This soil occupies landscape positions of <br />less than 4 hectares (10 acres) per single tract and occurs on <br />slopes greater than 10 percent. The soil moisture regime is <br />tonic and precipitation is less than 35 c~nn (14 inches). These <br />moderately steep soils are neither irrigated nor subirrigated. <br />The soil profile depth is less than 1 meter (40 inches) and the <br />pH often exceeds 7.4 in surface and subsoil horizons. The per- <br />cent slope times "K" (erodibility factor fran the Universal Soil <br />Loss Equation) is greater than 2.0. <br /> <br />