2004-09-29_REVISION - M1999120 - Laserfiche WebLink

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04004 Banks and Gesso, LLC Exhibit D -Mining Plan Overview The applicant proposes to add nine new parcels to the permit area that will increase the permit area by approximately 212 acres. Approximately 165 acres of additional land will be mined. The new mine areas will extend the fife of the mine by approximately 27-37 years with an expected mining rate of 500,000 tons per year. From the nine new parcels, five mining phases will be created as follows: Table D-1: Mining Phases Phase Name Total Acreage Mined Acreage Estimated Duration of Mining (years) Dir. of Mining Hill-Eber-Oakley Pit 49 44 6-8 South to North Parker-Panowicz Pit 36 26 5-7 South to North Swingle North Pit 48 37 6-8 South to North Swingle South Pit 45 38 6-8 North to South Golden Pit 34 20 4-6 West to East TOTALS 212 165 27-37 At any given time, mining and reclamation may be occurring in one or more bonded phases to accommodate blending of materials and relocation of the processing plant and settling ponds. There will be times when reclamation is being completed in one phase while mining begins in another phase. The applicant proposes to begin mining within the Hill-Eber-Oakley Pit. The order of mining the additional phases will be determined at a later time, and implemented via the Division's Technical Revision and phased bonding processes. All portions of the currently existing mine area (called the Fort Lupton Pit) will be mined as previously stated in the original permit application (M-1999-120). The following information pertains only to the additional five phases listed above. Mining Methods Each of the five pits will be dry-mined. A slurry wall may be constructed to The Office of the State Engineer's specifications around the perimeter of each additional mine area prior to commencement of mining in the new phases, which will isolate each mine area from the surrounding groundwater regime and allow for dry-mining of each mine area with minimal impact to the neighboring groundwater hydrology. However, if a slurry wall is not feasible, the Applicant will utilize a compacted clay liner to seal the pits for the end use as water storage. Mining operations within each new phase area will include topsoil and overburden stripping, and excavation of dewatering trenches, and settling ponds. Raw materials will be excavated with excavators, front-end loaders, scrapers and/or bulldozers. As areas Fort Lupton Sand and Gravel Mine - L.G. Everist, Inc. September 20, 2004 Amendmeni to Permit No M-1999-120 Page 6