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Pre - mining <br />Variable <br />Seleption <br />Trapper' Source <br />Division's Comment <br />R <br />30 <br />NRCS map of R factors for <br />Reasonable based on Trapper's location on the R factor map <br />Colorado <br />K <br />0.25 <br />Trapper permit Appendix Q, <br />Reasonable based on the soil types on the bond release <br />Section XIII, Table E -3 <br />blocks located on map M -29 <br />LS <br />9.99 <br />NRCS LS table for 510 ft. slope <br />Reasonable based on the 18% slope and 857 ft slope length <br />length, 15.7% avg. slope <br />accurately represented for reclaimed slopes <br />C <br />0.050 <br />NRCS C factor table for <br />Reasonable based on premining rangeland conditions and <br />specified conditions <br />applicable table for C value <br />Reasonable based the 1.0 erosion control practice factor <br />P <br />1.0 <br />NRCS P factor table for <br />corresponding to up and down hill farming (rather than contour <br />specified conditions <br />tillage), consistent with the pre- mining practice on the bond <br />release blocks <br />Post - mining <br />Variable <br />Seleption <br />Trapper' Source <br />Division's Comment <br />R <br />30 <br />NRCS map of R factors for <br />Reasonable based on Trapper's location on the R factor map <br />Colorado <br />K <br />0.25 <br />Trapper permit Appendix Q, <br />Reasonable based on the soil types on the bond release <br />Section XIII, Table E -3 <br />blocks located on map M -29 <br />LS <br />9.99 <br />NRCS LS table for 510 ft. slope <br />Reasonable based on the 18% slope and 857 ft slope length <br />length, 15.7% avg. slope <br />accurately represented for reclaimed slopes <br />NRCS C factor for permanent <br />pasture, rangeland, idle land, <br />C <br />0.014 <br />and grazed woodland - no <br />Reasonable based on the vegetation data presented in the <br />canopy, 79.3% herbaceous <br />SL -16 application (Table 1.2 -1) <br />cover, grass type (Table 1.2 -1 <br />of bond release submittal) <br />P <br />1.0 <br />NRCS P factor table for <br />Reasonable, as no control practices were utilized, compared <br />specified conditions <br />to the premining contour tillage <br />Trapper's two sets of premining and postmining SEDCAD models are in Appendix 3 of the bond release <br />application. Trapper utilized baseline data for selecting parameters for the SEDCAD 4 models of <br />premising conditions. Trapper utilized recent data in the bond release submittal for the models of <br />postmining conditions. The parameters reasonably represent the conditions in the field for the premising <br />conditions and the postmining conditions. <br />The Division's review of each of the parameters is in the table below. <br />