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• calculated as 1.65 standard errors of the mean, ie.: <br /> s <br /> conf. interval = 1.65 <br /> 4n <br /> Climate Data <br /> Precipitation data from the Seneca 11 Mine for the period of January 1987 through November <br /> 1989 were provided by Peabody. No long-term average for the mine exists, so the long term <br /> average monthly precipitation data from the National Oceanic and Atmospheric Administration <br /> (NOAA) for the nearby town of Hayden were used as the most appropriate base for comparison. <br /> Information on degree-days was also derived from the NOAA records at Hayden. <br /> RESULTS <br /> • Data from the 1989 revegetation monitoring studies at the Seneca II Mine are presented in table <br /> contained in Appendix 1. Lists of plant species observed during these studies in the reclaiemd <br /> and reference areas are included in Tables 33 and 34, respectively of Appendix 2. Seed mixes <br /> applied on areas revegetated prior to 1981 and in years 1981 through 1987 are included for <br /> reference in Appendix 3. Photographs of representative locations within the reclaimed areas <br /> sampled in 1989, as well as photos of the Mountain Brush and Sagebrush reference areas are <br /> included in Appendix 4. <br /> Cover <br /> Cover data from the eight reclaimed areas and two reference areas are presented in Tables 1 <br /> through 10. Shown in each are absolute foliar cover, frequency by species, and relative <br /> vegetation cover by species, all organized by lifeform/provenance categories. Figure 1 <br /> graphically depicts the summarized cover data tabulated in Table 29, comparing cover values to <br /> Mountain Brush and Sagebrush Reference Area standards. Cover in Areas C, D, and E exceeds the <br /> cover standard set by 90 percent of the sagebrush reference area. <br /> • Average vegetation cover in the reclaimed areas was highest in 1987 (72.1 percent), slighlty <br /> 5 <br /> I <br />