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A. Description of Meth ads <br />• Development work is performed via bulldozer ripping and pushing <br />of waste material and contaminated ore to selected dump areas. In <br />cases where dump locations are too far from development areas for <br />economical dozer work, waste material is loaded into dump trucks and <br />transported to the dump sites. Old mine pits are utilized as much as <br />possible as dump sites (see plan map, Gillespie Hill). <br />Once drill sites are level via bulldozer, the gypsum ore body is <br />penetrated with a rotary blasthole drill. The material is fragmented <br />(about 8000 tons per shot) via nonelectric nitrocarbonitrate blasting <br />systems. Thirty foot benches are utilized in pit planning of ore <br />extraction areas. Pfter blasting, ore is loaded into 25 ton trucks and <br />transported 2.5 miles to the rail head, located on the NE bank of the <br />• Arkansas River, where it is a~u~rshed to -4". During the crushing operation <br />gypsum is blended for product homogeneity and control of product specifi- <br />cations. Due to gross variations in product characteristics, (purity, <br />density, silica content, clay content, lime content), it is essential <br />that three faces be mined concurrently and proper blending techniques <br />be employed in order to result in a homogeneous product meeting all <br />quality specifications. A 1:1 stripping ratio is mandatory for maximum <br />life of the deposit. <br />B. Construction and/or Earthmoving <br />Construction of equipment and shop facilities was essentially <br />i <br />complete before 1960. No additional construction is planned on Mine <br />Land at this time. Shop facilities can be seen near center of aerial j <br />photos. <br />• <br />