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Ms. Erica Crosby <br />Division of Minerals and Geology <br />April 5, 2006 <br />Page 12 of 21 <br />b. A commitment from the applicant that they will provide the Division with a <br />construction report and engineer's certification of the slurry wall prior to the <br />exposure of groundwater. If the Division accepts that the report and <br />certification demonstrate that the slurry wall will function up to standard, then <br />the operation would be eligible for the reduced (20 percent of replacement cost) <br />slurry wall bond. <br />The applicant commits to provide the Division with a construction report and <br />engineer's certification of the slurry wall prior to exposing groundwater via a <br />Technical Revision. <br />29. The Division will estimate a cost to reclaim the site based on the information <br />submitted in the application. However, please state the overall affected areas of the <br />operation at any given time. In addition, the Division will include a cost to backfill <br />Phase 1. It does not appear to be included in the estimate. <br />Approximately 240,000 cubic yards will be required to backfill Phase 1, and the <br />backfill will include overburden and reject material from on-site. The maximum <br />disturbance of the site will occur towards the end of Phase 3, when reclamation may <br />still be occurring in Phase 2 and only Phase 1 will be fully reclaimed. At this point, <br />there may be up to 98 acres disturbed as follows: <br />a. Plant Area - 15 acres <br />b. Phase 2 - 31 acres (in process of final grading and/or seeding) <br />c. Phase 3 - 52 acres <br />Rule 6.4.19 Exhibit S-Permanent Man-Made Structures <br />30. The Gamueda structures (residence, outbuilding and well #17J and the Wilson <br />structures (residence and outbuilding) appear to be located within 200 feet of the <br />affected area, but was not noted on Exhibit C-1. Please revise the exhibit to reflect <br />these structures that are located within 200 feet, and provide mining offset <br />distances. <br />Exhibit C-1 has been revised to include the required labels. Excavation will not <br />occur within 200 feet of the Gamueda structures; however stockpiling and <br />processing may occur within 200 feet, for which Asphalt Paving Company will submit <br />either a setback agreement or engineering analysis to the Division prior to <br />disturbance within 200 feet. Excavation may occur within 200 feet of Wilson <br />structures, pending submittal of either a setback agreement or engineering analysis <br />to the Division. <br />31. The Robbins structure located within 200 feet of the affected land was not included <br />in the table of Exhibit S as being necessary to obtain an agreement to mine closer <br />than 200 feet, provide an engineering evaluation or maintain a distance of 200 feet. <br />Please revise the table in the exhibit accordingly. <br />