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Construction <br />The total disturbed area of the rock disposal operation (Gob Pile No. 2) was <br />approximately 50 acres, including the required, stockpiles, borrow areas and <br />sedimentation controls. Gob Pile No. 4 added another 5 acres of disturbance. <br />The capacity of the refuse disposal site (Gob Pile No. 2) is approximately <br />1,075,000 cubic yards. The capacity of Gob Pile No. 4 is approximately 300,000 <br />cubic yards. The projected amount of coal mine waste to be generated from the <br />mine and coal preparation plant was expected to average 200,000 cubic yards <br />per year. During 2004 and 2005 the coal mine waste generated from the <br />preparation plan was approximately 375,000 cubic yards per year. The <br />maximum height between the toe of the proposed fill and its ultimate top is <br />approximately two hundred feet. <br />The first task of the construction of the coal mine waste disposal area was the <br />construction of the sedimentation pond and associated collection and diversion <br />ditches. The second task was the stripping of topsoil, removal of all organic <br />material and salvaging cover material. The third task was the installation of the <br />• lateral drains, rock under-drains and excavation of the toe key into competent <br />material as per the recommendation of the following Lambert & Associates' <br />report. <br />The soil material exposed in the clearing and grubbing operations will be <br />compacted prior to material being placed. <br />The first 50-foot lift, which encompassed the lower 7.5 acres of waste disposal <br />site was initially cleared of trees and heavy brush. The footprint of the topsoil <br />and coverfill stockpiles was also cleared of trees and heavy brush. The trees <br />and heavy brush were stockpiled and burned. After the site was cleared of trees <br />and heavy brush, topsoil, organic material and vegetation (including sagebrush) <br />was stripped together and stockpiled in the topsoil storage area. Approximately <br />50,000 cubic yards of topsoil was salvaged for the entire extent of the pile. <br />Coverfill was salvaged and stockpiled in the designated area. Approximately <br />28,000 cubic yards were salvaged and stockpiled. <br />Gob pile number 4 is constructed on the borrow area approved by technical <br />revision number 43. <br />I• <br />TR-44 - 4 - 02/07 <br />APPRovs~ <br />/2oJo~ <br />