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<br />-6- <br /> <br />This should include stockpiling and stabilization of the topsoil, stabiliza- <br />tion of embankments and ditches (seeding), backfilling, regrading and contour- <br />ing, sealing of portals, etc. <br />2.05.4(2)(b) <br />Table 3.7-1 is insufficient in supplying information needed for the calculation <br />of the reclamation bond. Information which should be provided with supporting <br />calculations are based on a worst case situation; yardage of overburden to be <br />moved, average haul or push distances, equipment to be used (make and model <br />numbers), topsoil volumes, seed costs, cost of portal sealing, building removal <br />(Colorado has no claim to salvage rights), equipment time needed with specific <br />reference (i.e., Caterpillar Performance Handbook), identification of all <br />assumptions and correction factors, equipment cost (or rental), operating cost <br />per hour, fuel cost and labor. Calculation of the bond is a critical issue in <br />the permitting process. This information is necessary for determining costs <br />accurately. <br />2.05.4(2)(c) <br />1. No cross sections have been supplied of the post-mining surface in <br />accordance vrith 2.05.4(2)(c). These cross sections should include backfilled <br />areas along the face-up and bench cuts. <br />2. It is required that the sediment pond be left intact and functioning until <br />all other areas have been reclaimed (refer to 4.05.6(9)). The application <br />(p. 3-7) suggests that reclamation of the pond will precede reclamation of the <br />bench area. <br />3. Vegetation and topsoil are to be stripped and salvaged from the sediment <br />pond area. (see 4.06.2(1)). <br />4. The cross section of the sedimentation pond given in Figure 2.2-3 indicates <br />that an average of 8 feet (depth) of material will be excavated for the structure. <br />Since a stripping depth of 12 to 18 inches based on suitability is suggested <br />(p. 3-5 of application) how will the excavated material be handled? hill topsoil <br />and subsoil be segregated, if so how will it be stored? This section must be in <br />conformance with 4.06.2 and 4.06.3. Also it is unclear which soil types will <br />be affected and to what extent. For example, is the sedimentation pond to be <br />constructed within the area mapped as Rivra? This is important in the consider- <br />ation of topsoil management. <br />5. No provisions for testing the soil for nutrient deficiency following <br />reclamation is presented to comply with 2.05.4(2)(e)(vii) and 4.06.5. These <br />tests should be run before applying any amendments to the reclaimed areas and <br />prior to any reseeding efforts. <br />6. Aone-tailed t statistic was inappropriately applied for the determination <br />of sample adequacy in the vegetation portion of the application. MLRD staff <br />recalculated sample adequacy using the required two-tailed t statistic at a <br />90Y level of confidence. This reassessment found that sample adequacy had been <br />attained for only the greasewood shrubland and shadscale shrubland cover data. <br />Sample adequacy was not met for any vegetation type with respect to production <br />data, nor was sample size adequate for juniper woodland cover data. The Division <br />requests that the applicant supply sufficient docwnentation or explanation to <br />prove that sample size is adequate. If this request cannot be satisfied, these <br />areas will have to be resampled till adequacy is attained. <br />