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premining levels as determined by baseline data or in excess of levels determined on adjacent nonmined <br />areas". <br />With regard to Phase II bond release, details of the approved reclamation plan are given in Exhibit 2.05- <br />E6, Revegetation Plan, which states that: <br />As a first step in seedbed preparation, in areas where soil will be replaced, compacted surfaces <br />will be ripped to a depth of at least 12 inches before applying soil. In areas where soil is not <br />available for replacement or where surface materials are suitable, areas will not be ripped to a <br />depth that exposes any undesirable underlying materials. If this depth is less than six inches, then <br />soil will be added to attain a minimum depth ofsix inches. <br />The woody stem standard has been waived on all reclaimed areas, at the request of the land <br />owners/managers. Specific requirements of the plan (including the approved seed mix, the success <br />criteria and the sampling methodology) depend on the following factors: <br />• When the disturbance occurred (pre -law or post -law) <br />• Surface ownership (USFS, BLM, Oxbow or Hotchkiss Ranches) <br />• Vegetation community (Pinon juniper, Mountain shrub or Aspen/Conifer woodland) <br />• Post -mining land use (Undeveloped land or Industrial/Commercial) <br />Based on these factors, the sites included in the SL-2 application fall into three groups, with distinct <br />success criteria: <br />Group I (Bear Creek B-Seam Portal & Fansite (US Steel), Lower Hubbard Creek facilities area, <br />Hubbard Creek Fan 91 Site) <br />These sites were disturbed pre -law and have been approved for a post -mining land use of <br />"Undeveloped Land". Topsoil was not salvaged prior to disturbance with the exception of the <br />Hubbard Creek Fan 91 Site; here 4,330 cubic yards of topsoil was stockpiled and is to be spread <br />over the reclaimed area following final grading to a depth of approximately I foot. The <br />revegetation success requirement is one of minimum ground cover of living plants adequate to <br />control erosion, derived using the Universal Soil Loss Equation. Vegetation cover of the <br />reclaimed area will be successful when total live vegetation cover of the reclaimed areas is equal <br />to or greater than 90 percent of 19.3%, with 90 percent statistical confidence. <br />Group 2 (Boreholes/Pads/Roads) <br />These sites were disturbed post -law and have been approved for a post -mining land use of <br />"Undeveloped Land". Topsoil was salvaged at the time of disturbance and conserved in <br />stockpiles and windrowed berms (along roads). The specific reclamation plan for the borehole <br />pads and roads requires that: <br />Topsoil and suitable soil material stockpiled and/or windrowed in berms on the <br />perimeter of the disturbed areas will be redistributed at uniform thickness and reseeded <br />in accordance with the revegetation plan presented in Exhibit 2.05-E6, Revegetation <br />Plan. <br />C-1981-022, SL-2 Page 16 of 23 <br />