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Coulson Excavating Company, Inc. -Stroh Gravel Pit Exhibit D -Mining Plan Background and Procedure Mining operations will follow standard gravel pit mining procedures and will not require explosives to loosen the gravel. The effective pit area is approximately 70 acres. A gas pipeline owned by Kaneb Pipeline Co. (Kaneb) runs through the center of the permit area (See Exhibit C). An attempt was made to come to an agreement with Kaneb. This attempt was unsuccessful due to their 50 ft setback requirement and 3:1 slope requirement. Kaneb would have also required Coulson to conduct a metes and bounds survey of their easement at Coulson's cost. Exhibit - S; Geotechnical Stability analysis shows that a 40 ft setback as measured from toe of slope and regardless of slope, is adequate to maintain stability. Annual production is expected to average approximately 300,000 tons of aggregate, which will be used as raw material for an on-site asphalt batch plant. It is estimated that approximately 2,957,395 tons of gravel will be removed from the Stroh pit over a mine life of 14 years. The mine will be divided into two zones, a north and south zone. The gravel is estimated to be approximately 12-ft thick in the northern part of the pit and approximately 15-ft thick in the southern area. The north zone has been separated from the south due to the presence of floodway and Preble's meadow jumping mouse (Zapus hudsonius preblei) habitat in the northern area. The north zone will not be mined until a technical revision is submitted to the division. The decision not to mine this area under this permit is based on the cost of backfilling the ground to historic grade. The south zone covers an area of 69.5 acres and will be divided into 3 cells, each averaging approximately 23.2 acres. An average of approximately 322,156 yd3 of overburden will be extracted from each cell, totaling approximately 966,469 yd3. Additionally, the south zone contains approximately 2,957,395 tons of gravel. Mining is expected to proceed from east to west in the south zone. Table 1 below shows the cells in the south zone, the approximate area to be mined, volume of overburden and quantity of gravel expected to be removed from each cell within this zone. Table 2 below shows the approximate area to be mined, volume of overburden and quantity of gravel expected to be removed from each cell in the north zone.