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Ks . Candace Thompson <br /> November 26 , 1986 <br /> Page - 6 <br /> MLRD' s comment that Mid-Continent should verify that <br /> cut and fill volumes balance at each pad is not understood. <br /> Since complete AOC need not be accomplished for the pads, the <br /> amount of materials that would be backfilled is based upon that <br /> available by cutting down the outer portion of the pads, not <br /> by what is required to attain a specific slope configuration. <br /> Therefore, the cut and fill amounts do balance. Mid-Continent <br /> believes it would be unreasonable and unnecessary to haul in <br /> additional materials to accomplish slope grades of a few degrees <br /> more than can be accomplished by utilizing the materials avail- <br /> able at the pad areas as indicated on the cross-section charts <br /> included in our last calculations submission. Copies of all <br /> cross-sections will be included in the final revision of the <br /> reclamation cost calculations which will be placed in Appendix <br /> V-D-1 of the permit application. We do not believe that the <br /> locations of the cross-sections on the plan maps would be <br /> particularly helpful since they all represent the surface <br /> profile configuration of the pad on a verticle plane that <br /> extends perpendicular through the highest cut area of the pad. <br /> MLRD ' s concern about our estimates for normal <br /> sloughing of the haul roads cut banks is understandable if it <br /> is assumed that their reclamation will be completed in the <br /> second year after they are no longer being maintained. With <br /> the completion of the rock tunnel, or because of temporary shut <br /> down of most of the mines (as is the case now) at least two, and <br /> probably several, years will pass from the time the roads <br /> are maintained and the sloughing materials removed until final <br /> reclamation is accomplished. Our current experience with the <br /> Nos. 4 and 5 mine roads convinces us that the 30 to 40% figure <br /> is sound. The 175,100 cu. yds . of material that needs to <br /> be hauled in will come from barrow areas that are the <br /> extensions of the switchbacks. In almost every case these- <br /> have already been disturbed and will not result in any appreciatable <br /> amount of area to be reclaimed. It is practically impossible <br /> at this time to accurately identify each area as to exact <br /> location and size. They will be graded and revegetated as <br /> part of those programs for the other reclaimed portions of <br /> the roads. The 637 D scrapers will have no problem operating <br /> along roadways with no more than 8 to 10% grade and which have <br /> adequate 5Q to 60 foot wade turnaround areas . The MLRD comment <br /> concerning the productivity of the 14 G grader appears to be <br /> based on the assumption that all the slough area material would <br /> need grading rather than the actual requirement of leveling <br /> out the high and low area of sloughing. It doesn' t appear that <br /> calculations based upon acres per hour are as realistic in <br /> this case as those we are using of miles per hour and road <br />