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10.1 Mitigation of Friable Rock Deposits <br />It has been noted by DRMS and WFC that occasional deposits of friable shale or claystone deposits are <br />encountered in the Bench 1 overburden during stripping. Since these rock types are undesirable in the <br />Bench 1 material that is placed as either Bench 1 Substitute Subsoil or Spool, VVF6 conimits to ni i i i <br />the presence of this miaterial by vistially identifying and rernoving it during strippinq below the <br />topsoil and subsoil. <br />During the stripping of topsoil and Bench 1 spc+material, if any areas of consolidated, but friable rock <br />deposits are encountered, WFC operators performing topsoil stripping will follow the following procedure: <br />1) If the deposits are less than one truck load in size, the shovel operator will load the rock into a haul <br />truck, and instruct the haul truck driver to place the rock material in the backfill area at least eight feet <br />below the topsoil layer. <br />2) If the deposits are greater than one truck load in size, the shovel operator will leave the rock deposit in <br />place. It will than be removed during overburden stripping and placed in the backfill area at least eight feet <br />below the topsoil layer. <br />Rock deposits identified during stripping are buried immediately. However, during the placement of Bench <br />1 that has been stockpiled, further rocks may be identified. These are separated and buried the same as <br />during stripping, but may be temporarily piled near the Bench 1 stockpile for efficient transport. All rock <br />deposits identified within the Bench 1 are separated from the Bench 1 and buried at least eight feet below <br />the topsoil layer. <br />10.2 Subsoil and Topsoil Placement Equipment and Practices <br />Prime Farmland! Subsoil (Lift B Topsciffiench 1 Substitute Subsoilor Mixed) material will be placed via <br />haul truck and dozer. Prior to the placement of any material, stakes will be placed in the Bench 1 <br />overburden and marked with the height that ubsoil must be <br />placed to. These stakes will be placed in the overburden on a grid of 1 00' x 100'. Dozer operators will then <br />spread the subsoil over the area to the height marked on the <br />stakes. This will ensure that subsoil is placed at the appropriate <br />August 2013 (PR -08) 2.05.4(2)(d) -25 <br />