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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 92 acres. A gas pipeline owned by Kaneb Pipeline Co. (Kaneb) runs through the center of the permit area (See Exhibit C). Kaneb has no objections to the gravel pit operations, but have stipulated that an offset of 50 ft on either side of the pipe be established as a buffer. The mining cells have been offset 50 ft from the pipeline in all areas. In addition, per Kaneb's request, a 3:1 slope will be maintained during mining activities (See Exhibit S -Figure 1). 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 3, 916, 716 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 ofthe 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 azea. 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. The north zone covers an area of approximately 22.55 acres and will be divided into 14 cells, each averaging approximately 1.61 acres. Approximately 15,578 yd3 of overburden will be extracted yearly from each cell in the north zone, totaling approximately 218,090 yd3 over the mine life. In addition, a total of approximately 959,321 tons of gravel is contained in this zone. It is expected that an average of approximately 68,523 tons of gravel will be extracted from each cell in this zone during the 183-day period winter season defined as October IS to April 15. Mining is expected to proceed from east to west in the north 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. H:\Stroh\word\DMG\working_Exhibit D.doc