2012-08-07_REVISION - M1982131 (4)

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BUCKLEN EQUIPMENT CO PIT - ID# M- 1982 -131 I BUCKLEN EQUIPMENT CO Technical Revision EXHIBIT D Exhibit D has been revised as follows from the Amended Mine Permit as approved April 16, 1993. Deletions are indicated by strikeout, additions are noted by bold text. MINING PLAN Amendment Area A is the area to be mined. This area is along the Cache la Poudre River east of 21St Avenue, north of the Colorado and southern Railroad, and west of the City of Greeley Island Grove Park. The total area to be mined is approximately 30 acres. Amendment Area B will be used as a temporary location for the portable processing plant while the mining is being completed in the current permit area. Area B will be used for some stockpiling. This area is approximately 24 acres. The proposed mining method will be done as a dry mining operation. The existing mining area has operated as a dry mining operation for the past 100 years. A dewatering trench will be constructed around the perimeter of the mining area by phases and water will be removed by pump to an adjacent pond for settling and percolation into the alluvium. The location of the pond is shown on Exhibit C. The deposit to be mined is the valley fill deposit along the Cache la Poudre River. This deposit consists of sands and gravels with interspersed layers of silt and clay lenses. The deposit is relatively well graded and has aggregates as large as 12 inches and many fines passing the 200 micron sieve. The material will mainly be used as a pit run product. This means there is little crushing or washing done and it is excavated and hauled directly from the site. Occasionally some of the material will be washed and crushed. Approximately 5% of this material becomes reject or waste and is used for backfilling in reclamation. This area will be mined in two phases using scrapers and front -end loaders. We expect the mining to last for twenty (20) years. Phase 1 will start on the northeast side of the property and move to the southeast. Material in the lowlands area along the Poudre River and the City of Greeley Island Grove Pond will be removed and cleaned up first. Approximately 8.53 acres will be disturbed in Phase 1. During the initial phase of the mining, there will be very little topsoil to be removed. All overburden and topsoil was removed by previous mining operators. The portable processing plant will be moved into area A during the mining of Phase 1. This plant will be located at the site of the Old Farmhouse. (The farmhouse was given to the Western Hills Fire Protection District and was recently burned for training and practice.) Phase 2 of the operation will then begin in the uplands farm field as shown on Exhibit C. A dewatering trench will be constructed around the entire parcel as shown on Exhibit C and the Page 1 of 12