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Michael Boulay May 21.2008 <br />29. DRMS: Table 4.2-12 Runoff Volumes - Summary of Ditch Sizes - A note <br />at the bottom of the table says "See Figure 2.2-3 for Rip Rap Location". Figure <br />2.2-3 does not show locations of rip rap. <br />Please amend Figure 2.2-3 to show riprap locations. <br />CAM: Please see amended Figure 2.2-3 showing rip rap locations. <br />30. DRMS: Table 4.2-13 Culvert and Ditch Sizing Calculations - The Table lists <br />Design Points L, M, N, and 0. These points do not appear on Figure 2.2-3. <br />Please amend Figure 2.2-3 to identify the referenced design points. <br />CAM: Design points L, M, N and O were deleted as part of the TR-16 application <br />as they no longer exist. Please see revised Table 4.2-13. <br />31. DRMS: Division aerial photos of the site show the existence of a fence <br />beginning across McClane Creek, due south of the office area, and extending <br />southeast to the southern limit of the proposed Coal Mine Waste pile. This fence <br />does not appear on Figure 2.2-2. The fence will likely need to be reconstructed <br />on a new alignment to the south of the proposed new area of disturbance. <br />Please address the use and state of repair of this fence, and whether <br />relocation or removal of the fence during the period of mining operations <br />will impact surface owner management plans. <br />CAM: According to the BLM the fence is their Drift Fence #3. The Operator has <br />agreed to relocate the drift fence per DOW request (adequacy item #52). The <br />Operator will coordinate all work specific to the drift fence with the BLM. <br />32. DRMS: Section D-D' of Figure 2.2-3 depicts the original and proposed <br />ground surfaces. It does not depict the depth of excavation of native material <br />(topsoil and subsoil) that will be performed. This information will be a critical <br />component for evaluation of any subdrainage system proposed for the pile. <br />Please address depth of excavation in the appropriate narrative sections of <br />the application, and provide an amended section D-D' that depicts original <br />and excavated ground elevations. <br />CAM: Please see revised Section D-D' on Figure 2.2-3. <br />33. DRMS: Two separate drainage basins are labeled as "D-6" on Figure 2.2-3. <br />Please revise the drainage basin labels on Figure 2.2-3 as appropriate. <br />13