Laserfiche WebLink
Liberty Mining; LLC <br />DRMS 110 -d Permit Application <br />October 2013 <br />> 1.4 is the recommended parameter for safety factor of permanent slopes, so the <br />designed waste rock pile is considered stable. <br />C (1.a) Estimated Start Date and Ending Date <br />The Liberty Mine occupancy is dependent on the approval of the mining permit, market price of <br />ore and ore processing costs. The anticipated life of the mine is expected to be 10 years. <br />The Liberty Mine will normally operate for 8 to 12 hours per day, 5 days per week. Based upon <br />demand; the mine may operate up to six days per week for a maximum of 12 hours per day. <br />Due to BLM regulations, the remote location of the mine site, and lack of winter maintenance of <br />county roads used to access the mine, mining activities may be suspended during winter <br />months. Furthermore, mine operations may be intermittent contingent on ore milling costs and <br />market prices. <br />C (1.b) Salvaged Topsoil for Reclamation <br />Prior to commencing mining activities, any available topsoil will be removed from the mining <br />operations pad, stockpiled on site, and seeded for erosion protection. Due the geologic setting <br />and previous mining at the site, very little topsoil is anticipated to be available in the proposed <br />mining operations area. An existing topsoil stockpile is located on the southwest corner of the <br />mine operations pad within the existing footprint of the previously disturbed mining area. The <br />stockpile contains approximately 200 cubic yards of salvaged topsoil from previous mining <br />operations. This stockpile will be relocated to the northern portion of the permit area along with <br />any additional salvaged topsoil. During mining operations, disturbance of the existing topsoil <br />stockpile will be minimal. Topsoil will be stockpiled so that the last segment of soil stockpiled <br />will be the first to be placed during reclamation. Any relocated or augmented topsoil will be <br />stockpile and stabilized with vegetation through seeding within fourteen days of completion of <br />the topsoil removal and stockpiling. <br />C (1.c) Removal of Overburden and Waste Rock for Primary (Existing) Decline <br />and Secondary Decline <br />The existing mine portal and decline measures approximately 180 feet in length. An additional <br />320 feet of decline will be needed to reach the ore zone. The estimated quantity of waste rock <br />and overburden to be removed to reach the ore body is approximately 7,134 tons based on the <br />following calculations: <br />Mine Dimension (L *W *H) <br />• Rock Density (Sandstone @ 145 lbs. /ft) <br />• 2000 lbs. /ton <br />Primary Decline <br />[(10: * 12' * 320') * 145 lbs. /ft2 ) / 2000 lbs. = 2,784 tons <br />Secondary Portal and Decline <br />This secondary portal will be located 50' north of the existing portal <br />Liberty Mining, LLC Moab, Utah SMA Ref. 5821897 Page 17 <br />