Laserfiche WebLink
At the average stripping depth <br />55.91' overburden <br />+ 7.05' coal <br />62.96' material excavated <br />at 15% Swell <br />1.15 x (55.91) = 64.30 material replaced <br />64.30'/62.96' = 1.021 of the initial thickness <br />Therefore, the 0.8 requirement for thin overburden and the 1.2 requirement for thick overburden <br />are not met. <br />are not met. <br />At the maximum stripping depth <br />96.00' overburden <br />+ 9.60' coal <br />105.60' material excavated <br />at 15 % Swell <br />1.15 x (96.00') = 110.40' material replaced <br />110.407105.60' = 1.045 of the initial thickness <br />Therefore, the 0.8 requirement for thin overburden and the 1.2 requirement for thick overburden <br />Disposal of Excess Spoil: All excavated non -coal material from the mining areas will be used <br />for backfilling the mined pits and blending mined areas into the existing topography to achieve <br />the approximate original landform. Therefore, no excess spoil material will exist. <br />Post - Mining Topography Mining operations will be performed with shovel/truck and dozers at <br />NHN Mine. The post- mining topography was estimated based upon a 15 percent swell factor. <br />Section 2.05.4(2)(c) Page 3 November 2011 <br />