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Page 4 of 11 <br />Mr. Jared Ebert <br />January 20, 2010 <br />general knowledge of this area. Pipe sizing will be reevaluated as each phase is <br />opened for mining. Updated groundwater monitoring results and dewatering <br />operations in the current and adjacent phase will be evaluated to determine if the size <br />of the culverts will need to be adjusted. If this information results in a change to the <br />size of the culverts, the operator will update the Division with the annual report. The <br />culverts will be maintained in operating condition as long as Lafarge owns the <br />property. In addition, the location, invert elevation, and sizing ofpipes will be <br />included in the augmentation plan for the property. These culverts will provide an <br />overflow to set the high water elevation in the reclaimed cells. This will assure that <br />this commitment runs with the property and that additional water will not be <br />impounded on the property. <br />13. It states on Page E-3 of the reclamation plan Lafarge will concurrently reclaim mine <br />walls where mining has been completed according to the phases outlined in the <br />Mining Plan. Please provide more detail as to when reclamation will begin for each <br />phase of the operation, prior to initiating mining in the next phase. For example, will <br />the Operator completely mine Phase 1B and 1C with nearly vertical highwalls <br />without initiation reclamation until both phases are mined completely? Or, will re- <br />grading, topsoiling, and seeding be initiated once the disturbed area reaches a certain <br />size and the highwall a certain length? If so, please indicate those amounts. <br />The first half of Phase IA will be sloped and seeded during mining of the second half. <br />The second half of Phase 1A will be sloped and seeded concurrent with mining of . <br />Phase 1 B. Phase 1B will be sloped and seeded during mining of IC Phase 2 will be <br />mined in two phases - sloping and seeding in the first half of the mining area will <br />take place during mining of the second. Sloping and seeding of Phase 3 will take <br />place during mining of Phase 4A. The remaining mining and reclamation will <br />proceed in sequence with reclamation of the previous phase occurring during mining <br />of each subsequent phase. <br />14. In order to calculate the Financial Warranty, what will be the maximum length of the <br />highwall at any given time during the mining operation? <br />The maximum length of highwall at any given time during the mining operation <br />would be 4,195 feet (the total length of highwall for Phase 1B). <br />15. For the upland areas, will mulch be applied to the graded and topsoiled surfaces? If <br />so, how many tons per acre will be applied and will the mulch be secured to the soil <br />through crimping or other methods? Weed free straw mulch crimped into the soil <br />helps stabilize the soils from wind and water erosion, and also provides cover for the <br />newly planted seeds. <br />A note has been added to Exhibit E which states that all seeded areas, with the <br />exception of the silt-basin wetlands, will be mulched with weed free straw mulch at a <br />rate of one ton per acre and crimped to prevent erosion.