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On June 16, 1980, prior to commencing the reference areas study, a tour <br />of the mine was made by the following individuals: Ms. Carol Pahlke and <br />Mr. Jim Herron, Reclamation Specialists, CMLRB; Mr. Cass Legal of HG <br />Coal Company; Mr. Larry Jackson, Environmental Engineer for Yampa <br />Mining Company; and Mr. David Duba, Environmental Engineer for Morrison- <br />Knudsen Company. The purpose of the tour was to determine the neces- <br />sary information to be collected in the reference areas study. A letter <br />from Ms. Pahlke indicating her recommendations subsequent to the tour, is <br />appended to this report. <br />Prior to initiation of the study, a second meeting was held at the CMLRB <br />offices in Denver on July 25, 1980, with the same people in attendance. <br />The purpose of this meeting was to review the proposed program of work <br />with the regulatory personnel. A letter from Mr. David Duba concerning <br />the discussions of this meeting has also been appended. This letter was <br />reviewed by Ms. Pahlke and Mr. Herron, and the proposed program of <br />study met with their approval, except as they noted on the letter. <br />• Field work was commenced in late July at the mine. The initial task was <br />familiarization with the plant species and communities occurring on the mine <br />property. Four major plant communities were recognized on the basis of <br />visually dominant .species, and reference areas were established for each of <br />these: aspen, Gambel oak, sagebrush and chokecherry. Vegetation <br />sampling was conducted in each of these community types, both on the <br />area to be disturbed by mining, and on the reference aiea. The following <br />parameters were sampled: standing crop biomass and foliage cover of <br />herbaceous vegetation, and density of woody vegetation. In each plant <br />community, intensity of sampling foi• each parameter was such that the <br />sample mean value estimated within at least 10$ of the community's actual <br />mean value, with 80$ statistical confidence. <br />Additionally, a wet meadow community comprises a small portion of the <br />Hayden Gulch Mine permit area. Baseline information was collected on <br />standing crop biomass and foliage cover of this community. <br /> <br />