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North River Gravel Pit Weldon Construction <br /> 5. EXHIBIT D: Mining Plan <br /> 5.1. General Mining Plan <br /> Ace West Trucking established access roads and began mining the area in 1997 (under 110 Permit <br /> M-1999-007). They constructed truck loading areas, topsoil stockpiles, and leveled mining areas <br /> primarily on hilltops where sand, gravel and pit run aggregate was mined and stockpiled. Weldon <br /> Construction plans on continuing to access aggregate resources in these same areas in order to <br /> take advantage of past work to minimize additional disturbance to native shrublands in the area. <br /> Mined sands, gravels and pit run will continue to be used as a commercial gravel source to serve <br /> the needs of Chevron USA Inc. operations in the Rangely area, as well as other public demands. All <br /> equipment used to process gravel will be properly permitted by the State Air Quality Division. As the <br /> operational area is greater than 1 acre, a Stormwater Management Plan (SWMP)will also be <br /> developed. <br /> Approximately 18.75 acres will continue to see disturbance as part of mining operations. 12.87 <br /> acres will be excavation/removal areas; 2.70 acres will be for material storage, including 3.18 acres <br /> for topsoil storage, and the remaining areas will consist of roads, truck loading/turnaround, and <br /> other equipment operation space (which is included in "excavation area" calculations). No crushing <br /> or blasting is anticipated at this time; some screening will take place on site. No asphalt or concrete <br /> production is anticipated at this time. The two pit areas will not have any high walls. <br /> Mining will be at least 80 horizontal feet from the White River, but elevationally would be separated <br /> by at least another 100 feet. Mining activity will be at least 80 feet from permit boundaries. <br /> Additional mining and reclamation activities would include consolidating past disturbances and <br /> stockpiles and reducing the use of ineffective areas of the mine. The mining operation will be <br /> conducted in such a manner as to maintain existing drainage patterns. There is drainage that <br /> requires installation of a culvert or low-water crossing to maintain area flow patterns and would <br /> occur as operations allow. <br /> All mining and processing operations will be designed to manage stormwater runoff, so that no <br /> sediments flow to existing drainages. Equipment to be used consists of crawler dozers, maintainers, <br /> conveyors, and water trucks. <br /> 5.2. Schedule of Operations <br /> Production is anticipated to be approximately 50 to 75 tons per year. The deposit is believed to <br /> contain roughly 385,500 tons of effectively recoverable sand, gravel and pit-run sized material. <br /> Based on these assumptions, the pit would take many years to mine out. However, market forces <br /> and client needs dictate aggregate production, and mine life is based on current market conditions. <br /> No incidental products are anticipated to be mined at this site. <br /> Mining is anticipated to commence under the new 112 Permit upon approval from DRMS. Both the <br /> north pod and south pod may be mined depending on the type of aggregate desired; the northern <br /> pod supports more gravel and cobble-sized material, while the south pod supports more sand and <br /> gravel-sized material. <br /> 5.3. Mine Facilities and Operation <br /> The following activities will take place at the North River Gravel Pit: <br /> • Excavation and aggregate stockpiling <br /> • Screening <br /> 11 <br />