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6.4.4 Exhibit D -Mining Plan <br />6.4.4.6 UNDERLYING STRATUM <br />Underneath the sand and gravel lies bedrock composed of weathered shale and <br />sandstone (Foxhills) <br />6.4.4.7 COMMODITIES <br />The primary commodities of the mine are sand and gravel. There are no <br />incidental commodities. <br />6.4.4.8 EXPLOSIVES <br />No explosives will be used in the mining process. <br />File Pit 112 DMG Permit Application Rev 1.0 <br />Page 4 of 27 <br />