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RESULTS Vegetation Mapping (Exhibit 10-1, Sheets 1 and 2) Vegetation was mapped by Vern Piannenstiel of PWCC prior to the beginning of field work in both years' studies. This mapping was ground-truthed by ESCO and PWCC during spring floral surveys in June 1990 (toast Baseline Study Area) and site reconnaissance in July 1992 (toast Supplemental Study Area); refinements to the mapping were made at those times. Veggsation Types Seven vegetation types were identified and six sampled in 1990 within the toast Baseline Study Area. These vegetation types were; Aspen, Mountain Brush, Steep Mountain Brush (qualitatively described in 1990, quantitatively sampled in 1992), Sagebrush, Western Wheatgrass /Alkali Sagebrush, Mesic Drainage, and Improved Pasture - Subirrigated. The latter type consists of valley bottom areas with natural subirrigation that have had native vegetation replaced with introduced species for improved biomass production. Within the Aspen vegetation type, tree cover varied from a dense closed canopy to that provided by widely spaced trees; thus, both forest and woodland tree patterns existed; for simplicity, the unit will be referred to simply as the Aspen • vegetation type. In the toast Supplemental Study Area, the same seven types listed above occurred, along with four additional types including Alkali Meadow, Alkali Sagebrush / Greasewood, Improved Pasture - Upland, and Conservation Reserve Program Lands. Cover, frequency and species density data from quantitative sampling in the toast Baseline Study Area are presented in Tables Al through A6 (Appendix A), while those data from the toast Supplemental Study Area are presented in Tables B1 through 811 (Appendix B). Production data and statistics from quantitative sampling in the toast Baseline Study Area are presented in Tables A7 through A12, while those from the toast Supplemental Study Area are presented in Tables 612 through B16. Shrub /Tree density data and statistics from the toast Baseline Study Area are presented in Tables A13 through A18, while those data from the toast Supplemental Study Area are presented in Tables B17 through B25 . Tables A19 and B26 summarize the cover, production and shrub density statistics for the toast Baseline Study Area and toast Supplemental Study Area, respectively. Tables A20 and 827 similarly summarize, for the two areas, the relative vegetation cover statistics, by life form, for all six types. Tables A21 and B26 are summaries of species • density and top-layer cover by lifeform for the baseline and supplemental areas. Tables A22 and B29 present the sample adequacy estimates for cover, production, and shrub density. Tables A23 5