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~, <br />II <br />i~ <br /> <br />i~ <br /> <br />I , <br />I <br /> <br /> <br />i~ <br />EXHIBIT D <br />A7INING PLAN AND TIA7ETABLE <br />A9ining Plan. This sand and gravel open pit mining <br />operation is conducted on lands owned by William S. and <br />Beverly H. Caldwell and Dudley E. and Doris Sims. The <br />operator leased the property in January 1974. Prior to <br />commencement of mining activities by Valco in 1974, there <br />were no mining operations on the subject lands. Sand and <br />gravel mining had been conducted by other parties in <br />several locations north and west of the property. <br />Valco began its operations in the northern part of the <br />area (see map Exhibit D-1, Stage O; also see map Exhibit C) <br />but quickly found sand and gravel lenses thinning out to <br />no sand and gravel. In 1976 operations were moved to the <br />southern part of the lease where a hilly area (see map <br />Exhibits C and D-1, Stage I) gave promise of a thicker <br />deposit and more economical operations. Core drill tests <br />conducted in 1977 proved a much thicker deposit underlying <br />the western portion of the lease. <br />The core information indicates overburden varying from <br />0 to 9 feet. The sand and gravel deposit varies between <br />4 and 33 feet. It is a bench deposit well above the water <br />table. Thus, water will not be encountered during excava- <br />tion. <br />The operator plans to remove approximately 50,000 tons <br />of pit material annually. Based on this information, mining <br />stages have been estimated for five years in length, each <br />5 <br /> <br /> <br />