2010-11-16_PERMIT FILE - M2010055 (6)

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Rule 6.4.4 EXHIBIT D -, Mining Plan Map 5-Mine: Plan Map depicts the overall layout of the borrow pit. The plan shows one access point for the pit off of Weld County Road (WCR) 81. Five cross-sections on Map 7 have been prepared to depict the proposed slopes during the active mining phase of the project. Map 8-Erosion Control Plan provides more detailed information related to erosion and sediment control. (a) The mining operation is to borrow fill dirt. The fill dirt proposed to be extracted will be used by oil and gas companies in the surrounding area. As mining occurs, topsoil will be stockpiled as new lands are disturbed. The proposed Borrow Pit access road will be 24 feet wide and will be adequate for the level of anticipated truck traffic associated with this pit. The mine faces will be cut to a 3:1 slope, which will remain as the reclaimed slope. Map 5 Mine Plan Map and Map 7 Mining & Reclamation Cross Sections depict the mine layout and sections during mining; operations. The surrounding network of Weld County Roads will serve as haul routes for the pit products to the surrounding oil and gas destinations. All haul trucks will enter/leave the site from/to the north on WCR 81. Approximately half of the trucks will proceed west on WCR 120 and the rest will travel east on WCR 120. In accordance with the Town of Grover requirements no trucks will be permitted to travel through the Town. There will be a portable toilet, potable water, and a trash container on-site. A double cattle guard pad will be placed at the access to prevent tracking of mud onto WCR 81 and WCR 120. (b) Earthinoving activities will begin with removal and stockpile of topsoil. All stockpiles and berms should be located a minimum of 8 feet from the pit boundary to allow access for temporary seeding. The topsoil is approximately 6" to 8" in depth., Then backhoes and loaders will be used to excavate the fill dirt. The pit-run fill dirt will either be stockpiled for future loading of haul trucks or loaded directly into haul trucks. There will not be any screening or crushing of the mined materials. There will not be any scales on the site. The haul truck drivers are trained to keep their loads under the maximum limits through a combination of the following three methods. The air pressure inside the cab shows the pressure of the air bag support to the trailer, which indicates how much weight is on the trailer. The second method is by visual volume inside the trailer. The third method is by counting the loader buckets dumped into the trailer. (c) All proposed stormwater diversion ditches and sedimentation ponds are shown on Map .5 Mine Plan Map. The stormwater diversion ditches may be either a cut ditch or a berm, for the purpose of intercepting and directing surface storm water within the pit to one of the sediment ponds. The sediment pond will allow settling of any solids. A pump rated at 150 gpm with a floating suction line will discharge stormwater from the ponds. The discharge locations are depicted on Map 8 - Erosion Control Plan. The sediment ponds are to be constructed as soon as practical once mining operations commence. Both mining phases will progress from the east towards the west. The ponds will be constructed as soon as enough material has been excavated to allow the ponds to be constructed as designed and allow for safe operation of equipment in these areas. A diversion ditch for off-site