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6.4.4 Exhibit D <br />Mining Plan <br />The Verhoeff Gravel Pit will mine to a total depth of 25 feet. The target <br />reserve is approximately 10 -15 feet thick below approximately 10 feet of <br />overburden. The primary commodity is gravel with secondary commodity of dirt. <br />Overburden and fines will be retained on site for reclamation. <br />The life of the proposed operation is speculative due to fragile economic <br />condition of the construction industry. If economic demand remains low and <br />extraction is limited to less than 70,000 tons per year, approximately six acres per <br />year will be mined. At this slow extraction rate, the life of the mine would extend to <br />no less than 20 years. In the event demand for construction aggregate improves, <br />the life of the mine is anticipated to be 12 to 15 years. Determination of the life of <br />the mine is difficult. <br />The mine will develop in five phases with approximately 50 acres per phase. <br />Five phases will be delineated with boundaries transecting the property from east to <br />west. Phase I will be the southernmost phase and mining will progress northward <br />through the reserve. The life of each phase with low economic demand will be <br />approximately 5 years <br />Earthmoving equipment will vary with mine development. Depending on <br />depth of plant growth material and overburden, bulldozers and /or scrapers will be <br />used to expose target reserve. Loaders will extract the gravel reserve and feed the <br />processing plant. Bulldozers will maintain slopes and manage stockpiles when <br />necessary. Reclamation will require bulldozers and graders to contour slopes and <br />prepare surfaces for seeding. <br />The aggregate processing plant will move with the active mining phase. The <br />processing plant will include portable crushers, screens and conveyors. A portable <br />asphalt plant may operate on site in the processing area if required for a project. <br />During initial development of Phase I, the processing plant will be located on ground <br />surface. As the pit develops, the plant will be located on the pit floor and will remain <br />in the pit until the end of mining of Phase V. The control van will serve as operation <br />center for employees. All interior haul roads will be temporary, reclaimed as mining <br />progresses. <br />Mining products and byproducts stockpiles will be located within the bonded <br />area of disturbance. The top ten (10) inches of soil suitable as plant growth medium <br />will be salvaged and stockpiled for use during reclamation. Plant medium will be <br />stockpiled in perimeter stockpiles and posted as reclamation topsoil. Waste rock, <br />fines and overburden will be stockpiled and used to rebuild the pit floor and /or pit <br />slopes concurrent with mining. During initial development of Phase I, stockpiles will <br />be located on ground surface. As the pit develops, stockpiles will be moved to the <br />pit floor, below ground surface. Perimeter stormwater berms will be constructed of <br />overburden and fines as mining and reclamation progresses. <br />Reclamation will occur concurrently with mining. Slope grades will be <br />maintained no greater than 3H:1V during mining. When areas are mined out, fines <br />and overburden will be used to rebuild the pit floor and contour slopes as needed. <br />0 <br />