2011-02-28_REVISION - C1994082 (7)

Home Browse Search

following form to test the hypothesis of reclamation success for cover (CDMG 2005 revised rule, 4.15.11 (2)(b)): t _ Q-x S- x Where: x = Bond Release Block Sample Mean Q = 90% of Standard S- = Standard error of mean [ s / \In- ] x S = Sample standard deviation n = Sample size tc = Calculated t value tt =Tablet value (alpha= 0.1) see Rohlf and Sokal (1969) The (traditional) null hypothesis being tested would be that the bond release block mean (µ) was greater than or equal to 90% of the standard, stated as Ho: µ >_ Q. If t, was less than or equal to the 1-tailed t table value for alpha error probability of 0.10, at (n-1) degrees of freedom, then Ho was not rejected, and revegetation was deemed successful. Climatic Data Precipitation data were collected at the nearby Seneca IIW Mine during the period 1990 through 2010. Since the data record for Seneca IIW exists for only a relatively short period, the longterm average monthly precipitation data from the Western Regional Climate Center (WRCC) for the nearby town of Hayden (57 years) was used as an appropriate base for comparison. Information on degree-days was based on temperature data from met station 2 at the Seneca I IW Mine. RESULTS Numerical data are found in Tables 1 through 9 of Appendix 1. Sample data from the 2010 revegetation monitoring studies at the Yoast Mine are presented in Tables 1 through 5. Sampling data are summarized in Table 6. Data on species density by lifeform are tabulated for the sampled areas in Table 7. Data on relative cover by lifeform are compiled in Table 8. Statistical adequacy of sampling is reviewed in Table 9. The list of plant species observed during these studies (reclaimed and reference areas) is included as Table 10 in Appendix 2. Seed mixes used . in the reclamation areas are included for reference in Appendix 3. Photographs of representative ESCO Assoc. E-7