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2013-10-02_PERMIT FILE - C1981019A (3)
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2013-10-02_PERMIT FILE - C1981019A (3)
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Last modified
8/24/2016 5:31:59 PM
Creation date
10/18/2013 8:51:20 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981019A
IBM Index Class Name
Permit File
Doc Date
10/2/2013
Section_Exhibit Name
Rule 2 Permits -ST
Media Type
D
Archive
Yes
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RULE 2 PERMITS <br />• vegetation data are provided in sufficient detail to formulate a revegetation plan and facilitate <br />development of performance standards for the proposed disturbed area associated with the Lower Wilson <br />Mine Area. The referenced "Study Area" is a specific delineation within the overall Lower Wilson Area <br />that incorporates all proposed disturbances plus a buffer to facilitate modest engineering flexibility and <br />encompasses an area of 918 acres (Map 4B). Of this total, 896 acres are located in the main southern <br />mining block with 22 acres occurring to the north at the Wilson Creek haul road crossing to facilitate coal <br />transport to the Gossazd load-out faciliTy. The total acreages and percentage of each vegetation type <br />identified within the study areas and potential disturbance areas of the Lower Wilson Mining Area and <br />North Haul Road Crossing are presented in Table 2.04.10-8. The vegetation aeeas delineated aze shown <br />on Map 4B. Amine plan has not been fully developed for the Lower Wilson mining area; therefore, <br />disturbance areas aze not shown on Map 4B. Prior to conducting any mining activities in the azea, a mine <br />plan will be submitted to the CDRMS for review and approval. <br />A total of six vegetation community Types were identified from the Lower Wilson Study Area and <br />include: 1) Mountain Shrub (both xeric and mesic subtypes), 2) Sagebrush (both xeric and mesic <br />subtypes), 3) Aspen Woodland, 4) Juniper Scrub, 5) Grassland, and 6) Bottomland. The bottomland type <br />is comprised of a variable mixture of sagebrush, grassland, mountain shrub, riparian woodland, and small <br />stream side wetland communities that exist intermittently along the historic floodplain of Wilson Creek. <br />These community extensions into the alluviaUcolluvial drainage bottom soils have been segregated from <br />their upland progenitors and renamed (as bottomland) because of the typical increase in productivity <br />characteristic of this geomorphic landform. Avery small amount of dry-land cropland is included in the <br />northern 22-acre segment of the Study Area (Wilson Creek haul road crossing). This cropland is planted <br />to winter wheat in alternating years (average of 30 bushels/ac/yr) and is fallow when not planted to wheat. <br />This field was fallow in 2005. Also, two very small stock tank watering facilities (stock ponds) occur in <br />• the study azea but aze largely devoid of vegetation due to livestock /wildlife trampling. <br />General Background -Because this evaluation of vegetation was designed to support and extend <br />previous vegetation studies (as a permit revision), a complete baseline of vegetation resources was <br />determined to be unnecessary by both Colowyo representatives and the CDRMS. In this regard, it was <br />determined that baseline data should be collected from one community type which may be impacted, but <br />has not been quantified in the existing permit. Available options in this regard were the juniper scrub, <br />grassland, or bottomland communities. Given preliminary review of aerial imagery in compazison to the <br />proposed mine plan, it appeazed that the juniper scrub community would not be impacted by the Lower <br />Wilson project and impacts would be modest for the bottomland and grassland types. Because <br />bottomland disturbances would simply involve road construction the grassland community was selected <br />for sampling and reference area establishment. In addition to formal sampling of the grassland <br />community and reference area, it was deemed appropriate to collect supplemental ground cover data from <br />the remaining more dominant Types to facilitate correlation with historic data. All data were collected <br />from July 18 through 20, 2005 by Cedar Creek Associates, Inc. of Fort Collins, Colorado. In addition to <br />these data collection efforts, it was determined that the original vegetation communiTy mapping should be <br />upgraded to facilitate more accurate impact analyses and reclamation planning. <br />Methodology -The following is a description of methodology used in determining and delineating <br />vegetation communities within the Lower Wilson Study Area. <br />Community Type Mapping -Vegetation mapping information was developed based on the following <br />sources: <br />• 1. Colowyo Coal Company Permit C-81-019 -Application for Permit Renewal/Permit Revision - <br />Mining -Rule 2.04.10 (Colowyo Coal Co., 1991), <br />Soutf~ Taylor/Lower Wilson - Aule 2, Page 70 Revision Date: 1 /31 /07 <br />Revision No.: PR-02 <br />
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