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• 4.0 SUMMARY <br />A vegetation study was completed for Pueblo Coal at their Carbon Junction <br />Mine project 1.5 miles southeast of Durango, Colorado. The study was designed <br />in accordance with the rules and regulations of the Colorado Mined Land <br />Reclamation Division. The study program was reviewed and approved by repre- <br />sentatives of CMLRD. <br />This study quantitatively determined the vegetation cover, herbaceous produc- <br />tion, shrub density and height, and tree density for three vegetation units <br />in the permit area lsee Tables 29, 30, and 311. In addition, shrub production <br />was estimated based on limited clipping and regression analysis. Reference <br />areas were established for the Mountain Shrubland and Pinyon-Juniper Woodland <br />vegetation types. The Caprock phase of the Pinyon-Juniper Woodland was sampled <br />separately to indicate the degree to which Pinyon-Juniper Woodland revegetation <br />standards should be reduced to compensate for the extreme substrate conditions , <br />of the Caprock area. <br />Data were compiled and examined to characterize the vegetation of the site, <br />evaluate sample adequacy, and demonstrate that the reference areas correspond <br />appropriately to the respective affected area vegetation. Reference areas <br />will be used to establish standards for use after mine areas are reclaimed <br />and revegetation success is tested. <br />• A total of 207 vascular plant species were identified on the permit area <br />during 1982 and 1983 vegetation studies. No plants designated, proposed, or <br />under review for possible proposal for federal threatened or endangered status <br />or as state species of special concern have been located on the site. <br /> <br />-21- <br />