2018-12-26_REVISION - M2008078 (28)

Home Browse Search

EXHIBIT L Reclamation Cost Slurry walls have been constructed around Phases 1 through 4 and around Phases 5-12 (North Mining Area), and have been tested to ensure they meets the design standard in the "State Engineer Guidelines for Lining Criteria for Gravel Pits". See the attached approval letters from the State of Colorado Division of Water Resources. At this time Phases 13-17 are being used solely for stockipiles and sediment ponds. The financial warranty required for each phase of mining includes cost components for the areas of scarification of ground, topsoil placement, and revegetation required for that phase. Direct costs related to the construction of the reclamation components that have been included in the financial warranty calculations include: Backfill placement, scarifying disturbed ground surfaces, re-applying topsoil over disturbed areas, revegetating disturbed areas, slurry wall construction, and contractor mobilization. The slurry wall costs are based on the average depth of the wall to calculate the per lineal foot cost. Overhead, profit, and project management costs were then calculated and added to the direct construction costs to arrive at the required financial warranty for each phase. The financial warranty for all north mining phases and all disturbed areas has been calculated for the maximum anticipated disturbed area for the mine. Please see the attached calculations for details of the costs and quantities used to determine the financial warranty required for the mine. Prowers Aggregate Operators will submit a technical revision to the permit for the financial warranty calculations for the south mining area prior to any extraction of sand and gravel in that area. PAO commits to providing 100% of the cost to construct the slurry wall in the south mining area prior to mining below the static groundwater table elevation in the area, or will construct and obtain approval from the DWR for the slurry wall prior to mining below the static groundwater table elevation in this area and provide a bond equal to 20% of the cost to construct the wall until the reclamation of the south mining area is completed. PAO commits to submitting a technical revision including design drawings of the slurry wall prior to constructing it. The following table summarizes the financial warranty required for each phase, and the cumulative financial warranty that will be provided during any given phase. Prowers Aggregate Operators, LLC. J&T Consuiting,Inc. West Farm Pit—M-2008-078 DRMS 112 Permit Amendment Application