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MINING PLAN <br />important for the lowland areas as these two areas include a single drainage area and as described <br />previously lowland mining should proceed generally up the drainage. The two upland areas are more <br />or less independent as they are separated by a small drainage. Area 2U is the larger of the two upland <br />areas. The transportation connection between the two upland areas is already designated on the plan <br />and follows awetland-free area across the drainage where an existing small road crosses the drainage. <br />A culvert may be needed at this crossing, but a low water crossing would also work. At this point it <br />does not appear the drainage carves a great deal of water at the crossing location, but to avoid any <br />problems with sediment loads downstream or the creation of a damming effect, a small culvert is the <br />preferred treatment for this crossing. An 18" culvert should be more than enough to carry even large <br />flows under the drainage crossing. <br />Exhibit C-2 shows the appropriate soil/overburden stockpile locations. For Area lU, care must <br />be exercised to not excavate any closer than 200 feet from the north-south power line. Following this <br />power line is a water line and that is of more concern than the power line itself. Stockpiling of soil <br />and overburden can occur in this 200 foot setback, but no stockpiled material can be placed below the <br />power line itself. <br />From the upland areas, access to the plant will be through a road connection with existing <br />roads in the current mining areas to the west. This provides a short and safe route to the plant with <br />minimal interference with the power line or water line corridor and avoids crossing already reclaimed <br />land to the east of the processing plant. This route also maximizes the use of existing access routes in <br />preference to constructing a new access route. <br />For the lowland areas, mining should begin just east of the main north-south access route <br />through the site. Mining should then proceed eastward up the drainage. Soil and overburden <br />stockpiling must occur to the south of the mining area so as to avoid stockpiling anywhere near the <br />drainage. This is shown on Exhibit C-2. <br />Slopes on the sides of the East Valley are included in some portions of the two lowland <br />mining areas. These will be operated in the same fashion as upland mining areas, that is, generally <br />from the highest point to the lowest point. <br />In places, the existing drainage course will be adjusted as the current drainage course includes <br />some rather strange twists and turns that could potentially endanger the main north-south access route <br />through the site. In fact, in 2004, this road was very nearly cut by extension of the tight turn in the <br />channel that comes very near the roadway. Two very large thunderstorms during 2004 filled this <br />drainage with so much rain and hail that the main road was nearly cut through when one very tight <br />meander comes very close to the road. Exhibit C-2 shows an approximate new alignment of this <br />drainage. The new alignment is not a straight line, but maintains some moderate meandering. Once <br />the reservoir is built (assuming it will be built) drainage in this area will become less of a problem due <br />to a drastic reduction in the watershed area that feeds this drainage. But until that happens or even if it <br />doesn't happen, some adjustments to this drainage are needed to protect the roadway. Most of these <br />Coal Creek Sand Resource Amendment 3 (2005) - M-1988-044 Exhibit D Page 38 <br />