2008-02-14_REVISION - M1977071 (4)

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fK,^Y Answers to questions from letter dated September 14, 2007 Rule 6.4.4 Exhibit D-Mining Plan Question # 5, 6, 7 & 8 5. Please state the total area of land to be affected (in total) compared with the permitted area of 80 acres. Total area affected by mining operations minus buffer zones and area at the Mt. Elbert Conduit will be +/- 69.39 acres. 6. Please state the depth of the pit in the amended area and estimate the volume of overburden and topsoil that will be stored on site to facilitate reclamation of the pit. The depth of the pit will be no greater than forty five feet (45'). The estimated volume of overburden and topsoil that will be stored on site will be approximately one hundred fifty one thousand five hundred forty seven cubic yards (151,547 cyd). Calculated as 69.39 acres X 45,360 sqft/acre =3,147,530.4 sqft. 3,147,530.4 X 1.3 ft. average depth of topsoil and overburden = 4,091,789.52 cubic feet. 4,091,789.52 cubic feet / 27 cubic ft/cubic yard =151,547.76 cubic yards. 7. The Mine Plan states that the topsoil piles will be stored at a maximum slop of 3h:1v. Please inform the division how the piles will be protected to prevent wind and water erosion. If a seed mixture is proposed, please state the rate in PLS/acre, application method and timing of seeding. As stated, the Mine plan calls for a maximum slope of 3h:1v. It is the intent of the County to maintain a workable slope to all areas of the pit. Therefore, a maximum slope of 3h:1 v, was suggested as a interim slope during excavation and stockpiling. It is anticipated that the stockpiles will be graded down to a final slope of less than 3h:1v at the end of each year of crushing. The topsoil storage piles will be seeded each year as recommended by the Natural Resources Conservation Service at the rate and type of seed suggested by the NRCS, as outlined in the Exhibit E- Reclamation Plan as follows: Lake County Half Moon Pit #M-77-071 Lake County, Colorado