Laserfiche WebLink
1 <br />' Bartle Mountain Rc+ourcea, [nc. <br />l l2 Permit Modification <br />' Until the Deep West Pit is mined out, approzimagely 557,000 tons of <br />waste rock from the Pink Gneiss area will be hauled to tha South Waste Rock <br />' Disposal Area. The remaining waste rock, approzimate~y 6.7 million tons, <br />will be disposed of directly into the Deep West Pit. After mining is <br />completed in the Pink Gneiss azea, the area will be partially backfilled by the <br />' 864,000 tons of waste rock in temporary storage on W~ste Rack Disposal <br />Area B. <br /> <br /> <br /> <br /> <br /> <br /> <br /> TABLE D.3.41 ~ <br />WASTE ROCK MANAGEMENT (March 1994 Ta Eud O[ Mice Life) <br />ORIGIN DESTINATION QU (TONS) <br />Deep West Pit South Waste Area 31 ,000 <br />Deep West Pit Waste Area B 864,000 <br />Pink Gneiss Area South Waste Area 55'x,000 <br />Pink Gneiss Area Deep West Pit 6,70,000 <br />Waste Area B Pink Gneiss Area 864,000 <br />storage) <br />' D.3.5 <br />' The stability of the modified waste rock disposal azeas Chas been evaluated <br />using criteria previously presented in the approved permit. The thty of the waste <br />rock disposal azeas which aze not affected by this permit modi cation is described <br />' in Section D.3.5 of the approved permit. The computer progra~ originally used to <br />evaluate the slope stability of the waste rock azeas, PCSTABL4, was developed at <br />' Purdue University and is described in detail by Carpenter (1985)i The latest version <br />of the program, PCSTABIS, and the Modified Bishop Method ¢f calculation, were <br />used to evaluate the stability of the revised waste rock dispo~al facilities. Each <br />revised facility was evaluated for static and pseudostatic loadingconditions for both <br />the construction configuration and the reclaimed configuration. As in the previous <br />' analyses, a maximum pseudostatic coefficient of 0.15 g wa$ used to stimulate <br />horizontal acceleration. The analyses assumed that due to the nature of the waste <br />rock and the pile configuration, a phreatic surface would not develop within the piles. <br />ay 9, 1994 p_~y 5K1C rno~ec[ no <br />