Laserfiche WebLink
Mr. George Wear - 3 - October 29, 1986 <br /> The Division also has the following comments on the remainder of the <br /> production work associated with the a haul road backfilling: <br /> a. Productivity for the 14G grader may have been overestimated. The <br /> Division estimates that 6074 feet/day (based on 1 .57 ac/hr) could <br /> be graded. However, with the Division's proposal only one year of <br /> grading would be necessary. The cost would therefore be: <br /> 56,200 feet <br /> 6074 eet day x 8 hr x $60.00/hr = $4,441 .00 <br /> b. The Division has calculated backhoe production at approximately <br /> 170 lcy/ hr. Mid-Continent's estimates of 200 lcy/hr, as well as <br /> the dozer grading figure, are acceptable. <br /> 3) The Division requires further information on the Rock Tunnel to <br /> prep plant backfilling and grading plan. Cross-sections and volumes <br /> must be submitted for the portal and bin benches. The plan for the <br /> bin bench area in particular appears to be significantly different <br /> from the approved plan, which called for 63,000 c.y. of fill . In <br /> addition, backfilling of the bins must be calculated despite the <br /> fact that they have not yet been built. As with the bin cover <br /> demolition, any approved activity must be bonded. In order to <br /> delete these activities from the bond, Mid-Continent would have to <br /> request that the Division withdraw approval for these activities. <br /> Backfilling costs for the conveyor corridor are satisfactory. <br /> 4) For the prep plant backfilling costs, Mid-Continent has <br /> overestimated dozer productivity. The Division has calculated this <br /> as follows: <br /> Push Distance 100 feet <br /> Unadjusted Production 940 lcy/hr <br /> Correction Factors <br /> Operator .75 <br /> Material .80 <br /> Efficiency .83 <br /> Altitude .95 <br /> Adjusted Production T45 lcy/hr <br /> 50,500 lcy <br /> Cy/hr x $118.00/hr = $13,391 .00 <br /> This would raise the total cost to $149,561 .00 <br /> III. Topsoiling <br /> 1 ) In order to assess Mid-Continents retopsoiling plans, the Division <br /> requires the following information: <br />