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-5- <br />water on the road. This must be shown on typical cross-sectional drawings. <br />4.03.1(4)(b) and 4.03.2(4)(b) The applicant must provide an adequate berm along <br />the outer edges of all road embankments to prevent surface runoff from the road <br />from discharging across the fill slope. This 6e nn shall be shown on a typical <br />road cross section. <br />4.03.1(4)(e) and 4.03.2(4)(e) The applicant must orovide sufficient data and <br />calculations to demonstrate that all road cross-drainage culverts are capable of <br />passing the 10-year, 24-hour precipitation event. <br />4.03.1(5)(a) and 4.03.2(5)(a) The applicant must provide specifications for the <br />surfacing of all roads in the facilities areas with a sufficiently durable, non- <br />toxic, non-acid forming material. <br />4.03.1(6) and 4.03.2(6) The applicant must submit a plan for the maintenance of <br />all existing roads in the facilities area. <br />4.03.1(7) and 4.03.2{7) The applicant must submit a plan for reclamation of all <br />roads in the surface facilities area in accordance with the requirements of this <br />section. <br />4.03.2 The access road to the proposed ventilation shaft east of the east portal <br />surface facilities area has been deleted from the plan, as shown in Appendix XXI-9 <br />of Volume TV of the mine plan. Therefore, all reference to this road should also <br />be deleted from the mine plan, instead of perpetuatipg its existence by discussing <br />its design and referencing it to drawings on which it has been removed. <br />2.05.3(4) 4.05 Ponds, Impoundments and Diversions <br />1. The applicant has not used methods as described in Appendix E for basin slope <br />and shape correction in calculating peak flows. 'Revised calculations, using those <br />methods in Appendix E, with necessary pond and diversion design revisions should <br />be submitted, along with necessary supporting data'. <br />2. The soil erodibility (k) factor used in l1SLE calculations appears low <br />according to our investigation. How was the "k" value of .15 selected? <br />3. How was sediment density of 100H/cu. ft. used in pond design derived? <br />4. All ditches must have a designed freeboard of at least .3 ft. WSC should <br />submit revised designs incorporating freeboard as required by section 4.05.3(6)(b). <br />5. WSC should provide more detail on the design of the lJest Side Middle Limb <br />Culvert, addressing the problems of design headwater and tailwater. 41SE should <br />describe inlet and outlet configurations, state whether culvert is inlet or outlet <br />controlled, designate type of pipe to be used and give length of type and installed <br />slope. <br />6. The 41est Mine Sediment Pond will require a baffle to prevent west inlet water <br />from short circuiting. <br />7. blSC must address the question of detention time in sediment pond design. The <br />Division requires this information in order to judge the liklihood of the effluent <br />standards being met. <br />8. It is apparent that I1SLE data for Plnrris and I1.S.S. ponds have been exchanged. <br />