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• r 1 COVER The cover performance standartl was calculated in accordance with procedures contained in the Seneca II permit and is based on twice the acreage-weighted average of herbaceous cover in the Mountain Brush and Sagebrush reference areas. The acreage weighting was based on the relative acreage of these two communities in the baseline studies. Specifically, weighting was based on Mountain Brush Reference area as 83 percent and Sagebrush Reference area as 17 percent of pre-mining vegetation cover. A line that demarcates 90 percent of this standard has been placed on Figure 1. When sampling for bond release occurs and the parameter mean for a bond release block is at least 90 percent of the calculated success standard or approved technical standard, then revegetation should be considered successful for that parameter. Performance Standards HERBACEOUS PRODUCTION The performance standard for this parameter is calculated similar to the cover performance standard, except that the factor of 2 is omitted. WOODY PLANT DENSITY As of the time of monitoring, the performance standard for woody plant density at the Seneca N Mine was 1,000 stems per acre. Climatic Data SCC provided precipitation data for the Seneca II Mine for the period of January 1982 through September 2003. Since the long-term average for the mine exists for only 20 years, the long- term average monthly precipitation data from the Western Regional Climate Center (WRCC) for the nearby town of Hayden was used as an appropriate base for comparison. SCC also provided temperature data for the Seneca IIW Mine in 2003; these data were used for temperature analysis on the Seneca II Mine. RESULTS Sample data from the 2003 revegetation monitoring studies at the Seneca II Mine are presented in Tables 1 through 21, contained in Appendix 1. Sampling data are summarized in Table 22. • Data on species density by lifeform are tabulated for sampled areas in Table 23. Data on relative 5