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The cost to reclaim the site, including a 100°.'o slurry wall construction totals $I,'~0,00.00. A total cost for 20% slurry wall construction totals $406,00.00. If the operator wishes to obtain the bond for t}te 20% slurry wall construction cost, then the operator will need to provide the additional information as noted above in item #2. At this point in time. the Division will require that a bond be posted in the amount of $1,20,00.00 prior to issuance of the permit. Enclosed. please find a copy of the reclamation bond estimate. 4. The applicant states that the proposed interior dike will be oriented parallel to potential tload Flows and will be at a low, 3 foot, profile above the high water level of the reservoir. The dike will also employ a cross drain between the two reservoirs, and the applicant will be providing written agreements with owners of structures to be relocated onto the dike. All of these factors tend to mitigate any concern with [he stability of [he backfill. However, Rule 3.1.E requires an applicant to describe how backtilled materials will be managed to ensure adequate compaction for stability. The Division has the following questions or concerns relative to the proposed dike: • The applicant proposes to use excess topsail stripped from the top three feet of the ground profile mixed with weathered shale to construct the dike. The Division recommends that A- Horizon soils be segregated for replacement in locations requiring revegetation and that B- Horizon or lower soils be used [o construct the dike and backfill the shorelines. • The applicant describes dike construction stating that topsoil and shale will be placed in alternating layers and compacted with a dozer to ensure mixing and compaction. The two types of material must be thoroughly blended to enhance stability. The applicant should describe in detail how this blending of materials will be accomplished. Degree of compaction will be further discussed below. • The application states that the dike and the pond shores will slope at 3:1 for 10 vertical feet below [he maximum reservoir water level, then at 2:1 thereafter. The 3:1 slopes should be extended to 10 vertical feet below the ordinary low water mark anticipated for the reservoirs. • The Division does not typically require a rigorous discussion of specifications and testing for a dike such as the one proposed. However, the applicant should provide a discussion of maximum lift thickness during construction, the compaction goal as a percentage of maximum dry density, a method compaction specification in terms of the number of passes and the types and sizes of equipment that may be employed, and control of moisture content in the backfill. The application mentions compaction using dozers. A higher degree of compaction could be obtained using rubber tired equipment. • Compaction methods around the cross drain culvert should be described. The applicant should commit to providing a construction report describing installation of [he interior dike with each annual report during years that dike construction occurs. The construction report would detail construction observations relative to the general specifications discussed above, and would provide the results of any testing of the backtilled materials. 5. The applicant states that prior to the Division's decision due date of March 27, 2000, the applicant will provide the notarized and signed agreements/waivers as required under Rule 6.4.19. Such entities/individuals who fall under the category are as follows;