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• ~ III IIIIIIIIIIIIIIII 999 Memorandum T0: Brian Munson FROM: Jim Herron RE: H-G Soils and sediment control review. I have finished my review of the H-G application on the above referenced topics. I am unable at this time to make any written findings on topsoil and topsoil salvage because there is still some question on how much topsoil is available and how much will be redistributed. The questions are listed under reclamation plan since they are more of an operations question than a baseline question. I was also unable to make any findings on the sediment control plan because of a gross deficiency of information. Once this list of questions are answered sufficiently, I should be able to make findings. 2.05.4 Reclamation Plan 1. The applicant must clarify how total disturbed acres, area of topsoil removal, reclaimed acres, and Area (acres) in table 2 of Section 2.05.4, balance. As an example, in 1980 the total disturbed acreage is 281.5, 28.6 acres are stripped of topsoil, and 46.0 acres are reclaimed; this should leave 264.1 acres disturbed in 1981. However, this does not agree with either the disturbed acreage in 1981 or the area (acres). Please clarify. 2. The applicant should clarify why the depth of replaced topsoil incr~ses from 1.4 feet in 1980 to 2.1 feet in 1985. This information was derived from the reclaimed acres in Table 2 and the topsoil replaced in Table 3. Also, since the applicant states that there is an average of 27 inches of topsoil avail- able, why are stripping depths less than two feet. The applicant is advised to average all depths from sampling sites in order to determine how much topsoil is available. 2.05.3(4) Sediment Control 1. The applicant must submit plans and cross sections of the explosives storage area pond, sanitary landfill pond, pond near the office, and 'Tipple area ponds. The plans and cross-sections must be certified by a registered professional engineer. 2. The applicant has stated that the 3.4 acre feet of storage above the sediment storage level will be pumped out. The applicant is advised that the pump intake must not be below the maximum sediment storage level. Please clarify how pumping will be accomplished without pumping sediment from the pond. 3. The applicant did not fully answer question 2 under 2.05.3(3) b & c. The only culvert sting calculations submitted were for the three ponds west of County Road 53 and culvert IfB. The design specifications must be supplied for the