_PERMIT FILE - M1997053 (24) - Laserfiche WebLink

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iiiiiiuiii 3� t EXHIBIT D MINING PLAN ' CLIFTON WATER GRAVEL PIT ' The proposed gravel pit is located east of 34 Road on the north side of the Colorado River in Mesa County. The site to be mined is a portion of river bottom owned by the Clifton Water District on ' which there treatment plant is located and contains 154 acres. The topography of the is "flat", with less than one percent slope to the southwest. ' The area to be mined is bounded by the District on the west and south,the Colorado River on the east and the Elam-Bounds gravel pit on the north. See Exhibit C. ' The area leased from the District for mining contains 13.4 acres. A 30 foot mining setback will be maintained along the north property line and a 100 foot setback will be maintained along the River. ' Mining will be done using front end loaders, hydraulic excavators, dozers and trucks. The mining operation consist of 1)stripping, 2)dewatering and 3)mining the sand and gravel deposit. ' 1). The topsoil and overburden which overlays the sand and gravel deposit is stripped using dozers, loader and trucks. The material will be stockpiled around the perimeter of the ' pit for later use in backfilling and reclamation. 2). The area stripped is next trenched using a hydraulic excavator. A pump is placed in the t trench to dewater the excavation. The ground water will be pumped to the Colorado River. ' 3). The sand and gravel deposit will be mined using a front end loader. The material is either feed directly into a crusher or loaded into trucks and stockpiled. After all the sand and gravel has been mined from an area,the sides of the resulting pit will be sloped ' dozer. ' The site will be mined starting in the northeast comer of the pit and proceed to the west. The first phase will include mining the east 4 acres and stockpiling the material in the northwest comer of the site on an area containing approximately 2.5 acres. Overburden from the first phase will be ' stockpiled within the 100 foot mining setback along the River. The existing dirt road leading to the pit area from the Clifton Water access road will be widened to 24 feet and graveled to provide access to the site. This road will remain in place for the Districts use after mining has been ' completed. The second phase to be mined will be an area of approximately 4.6 acres located in the southwest comer of the site. A portion of this area is presently being used by the District to stockpile sediment from the water treatment plant. This material will be used to flatten slopes in the pit. The last phase to be mined will be the stockpile area Material from this phase will be either trucked from the site or stockpiled in the bottom of the pit. Overburden from the last two phases will be used for backfrlling and slope flattening of areas previsouly mined.