Laserfiche WebLink
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 Colowyo's plan for disposal of debris, acid - forming or toxic materials, <br />or materials constituting a fire hazard in a manner designed to prevent contamination of ground <br />or surface waters. A contingency plan has also been developed to prevent sustained combustion <br />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. <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 />PAP. A summary of this information is found in the section of this document entitled <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 Harner 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 />Juniper Scrub and Cropland. Disturbance boundaries have not been projected with specificity <br />for the proposed Lower Wilson expansion area. <br />Proposed Decision and Findings of Compliance January 2012 <br />Permit Renewal 06 Page 148 <br />