2003-01-02_REVISION - M1986147 (2)

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icxhibit D Mining Plan Icontl We expect to start on the west side and northern end of the new area and mine to the south. IN the western parcel the gravel is a little courser, so mining will take place on two faces to supply the product needed in our business. The depth of the sand and gravel is 25 to 40 feet deep in this area. The estimated direction of mining is shown as a series of arrows on the Mining Plan Map. Mining will begin in each area by stripping topsoil and overburden, if any, from an area large enough to begin mining. An explanation of how mining is done on this site can be found in the Mining Plan text in the 1996 application packet. The slopes will be created as mining progresses around the mine perimeter. Waste material, and overburden will be used to rebuild the exterior slopes as mining progresses across the site. This will reduce the amount of backfilling work needed at any one time. Please see Map Exhibit C-1 for how the area may look as mining progresses through it. No more than 600 feet of exterior slope will need backfilling at any-one-time. The working face is at its maximum width as mining comes to a close on the south end of the site, approximately 2,240 feet long. No additional setback will be needed around the perimeter of the mined area because McAtee does not use a cut/fill method of slope creation for the exterior slopes. If mining ended prematurely, the working face would be reduced to 3:1 using a cut/fill method instead of backfilling as noted for the side slopes. AMENDMENT 2 - Revised Mining Timetable - `' ACAES PHASE YEARS MINED MINING SLOP; 1`04$ AREA: ExisTiNC AREA 3-5 37.40 35.19 2.21 NEw AREA 10-18 68.47 58.31 10.16 TOTALS 105.87 93.50 12.37 4