Laserfiche WebLink
Climatic Data <br />RESULTS <br />(s r) <br />Where: <br />n m;n = the number of sample points needed in a given vegetation type <br />to be capable of detecting a 15% reduction in the mean with 90% <br />confidence; <br />s = standard deviation (n -1); <br />t = the t statistic (one - tailed, 90% confidence; n -1 degrees of <br />freedom; if n >30, t = 1.282 for purposes of this study); <br />d = acceptable amount of inherent variability to be identified <br />between the sample mean and the true population mean (0.15 for <br />purposes of this analysis); <br />x = sample mean for woody plant density data. <br />Seneca Coal Company (SCC) has historically provided precipitation data for the Seneca II (and PSCM) and <br />IIW Mines, however 2012 data was not available as of December 2012, and therefore 2012 precipitation <br />data were obtained from the NOAA administered Western Regional Climate Center (WRCC) for the nearby <br />town of Hayden (Station 053867). Since the long -term average for the Seneca IIW mine exists for only 26 <br />years, the long -term average monthly precipitation data from Hayden (Station 053867) was used as an <br />appropriate base for comparison. Temperature data from the Hayden station was used as well. <br />Sample data from 2011 are presented in Tables A -1 through A -14. Sample data from 2012 are presented in <br />Tables B -1 through B -14. Sampling data for 2011 and 2012 are summarized in Appendix C. Data on cover, <br />production, and woody plant density are in Table C -1. Data on species density by lifeform are tabulated for <br />sampled areas in Table C -2. Data on relative cover by lifeform are compiled in Table C -3. Statistical <br />adequacy of sampling is reviewed in Table C -4. The list of plant species observed during (reclaimed and <br />reference areas) is included as Table D -1 (2011) and Table D -2 (2012). Seed mixes used in the reclamation <br />areas are included for reference in Appendix E. Photographs of representative locations within the <br />reclaimed areas sampled in 2011 and 2012, as well as photographs of the Reference areas, are included in <br />12 <br />