Laserfiche WebLink
material not required for reclaiming highwalls and other depressions need not be returned to <br />approximate original contour [Rule 4.14.1(2)(a)]. <br />3. In order to conserve soil moisture, ensure stability, and control erosion on final graded slopes, <br />the Division approved cut-and-fill terraces. These terraces are compatible with the post-mining <br />land use, and will meet all the requirements of Rule 4.14.2(2). <br />4. Permitted small depressions (less than two acre-foot in capacity, embankments less than five- <br />feet) in the backfill are used to minimize erosion, create or enhance wildlife habitat, conserve <br />soil moisture, and promote revegetation. The Division specifically approves each such small <br />depression [Rule 4.14.2(3)]. <br />5. The Division approved the Applicant's plan for disposal of debris, acid-forming or toxic <br />materials, or materials const.±uting a fire hazard in a manner designed to prevent onntarninat;nn <br />of ground or surface waters. A contingency plan has also been developed to prevent sustained <br />combustion of flammable materials [Rule 4.14.3(1)(a)]. <br />6. The Division approved the method and design specifications for covering of acid-and <br />toxic-forming materials in order to prevent leaching into surface and ground water and to ensure <br />backfill stability Rule 4.14.3(2)]. <br />XIII. Revegetation - Rule 4.15 <br />The Permit was found to be in compliance with Rule 4.15 with two Stipulations (12 and 13). <br />A. Baseline Vegetation Information <br />Baseline vegetation information is found in Section 2.04.10, Exhibit 10 and Maps 3 and 4 of the <br />Permit. A summary of this information is found in the Summary section of this document, <br />"Description of the Environment." Baseline information specific to the Lower Wilson and South <br />Taylor Pit areas is presented in Section 2.04.10 text, Tables 2.04.10-7 through 2.04.10-32, and <br />Figures 2.04.10-5 through 2.04.10-10 of Volume 12. Baseline information presented in the <br />application for the South Taylor Pit area is drawn largely from a 1985 vegetation inventory <br />report prepared for Consolidation Coal Company by Hamer and Associates, Inc. (Exhibit 10, <br />Item 5 of Volume 13). Vegetation mapping is presented on three separate maps within Volume <br />14 (Map 3-Regional Vegetation, Map 4A-Vegetation South Taylor Areas, and Map 4B- <br />Vegetation Lower Wilson Areas). <br />Mountain Shrub and Sagebrush communities are the dominant vegetation types throughout the <br />original permit area. Mountain Shrub is the dominant community in disturbed areas associated <br />with the South Taylor Pit, with lesser but significant acreages of Sagebrush and Aspen <br />Woodland communities. Communities of minor extent include Bottomland and Grassland. The <br />same mix of communities occurs in the Lower Wilson expansion area, along with small areas of <br />Proposed Decision and Findings of Compliance 14 September 2009 <br />Permit Renewal 05 Page 57