2019-02-26_REVISION - M1996052 - Laserfiche WebLink

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L.G. EVERIST, INC. FIRESTONE GRAVEL RESOURCE M-1996-052 Revised: February 8, 2019 RECLAMATION COST REVISION The following information is provided to reevaluate the current bond and is based on the layout of the 2010 CIRCES COST SUMMARY FORM the Division provided during the last amendment permitting process . The numbers and sequencing were left in the order presented in 2010 for ease of following this estimate. The numbers presented in each item are updated where needed. At this mine it is not necessary to import fill material to complete reclamation on the site . The methodology for the reclamation did not change only the areas of work were increased to reach a maximum disturbance that is the most expensive area to reclaim. Map Exhibit C-1 Mining Plan Map (revised 1/2019) shows how the mine would look at the time presented in this estimate . The change made to the information previously provided includes, increasing the total disturbance area; the length of working face: and the amount of area needing reclamation. The QA/QC number directly reflects the costs L.G. Everist has paid on 3 recent slope construction projects done by an outside construc- tion company. The superintendent time is based on those projects also. Typically the superintendents we have worked with are at a site for 2 hours a day and their lead equipment operator then provides supervision the rest of the day. We used the same equipment chosen in the 2010 estimate . The primary change is calculating a bond amount for the compacted liner that involves using the entire perimeter length of the liner for the small lake on Stage 2 (26501 ) and the perimeter of Stage 3 (10 , 3501 ) a total of 13 , 000 linear feet . For the slope we used an average depth of 35 feet so there is 68 . 055 cuyds per liner foot of bank sloping material needed (35x105/2)x1fU27cufUyd) for a total of 884 , 722 cubic yards . This estimate also uses 4 dozers to do the sloping due to the sheer volume of material needing to be moved. The material will be shale on the mine bottom and will be pushed up from the bottom so no material will be imported. Dewatering costs are based on dewatering 115 . 02 acres . In Stage 2 & 3 average depth 35 ft for the 38 . 98 acres not covered by settling ponds . The depth over the settling ponds areas is an