Laserfiche WebLink
Confidence limits for comparisons to reference areas and technical standards <br />were calculated using a 1-tailed t-value for alpha error probability of 0.10 at (n-1) <br />degrees of freedom multiplied by the standard error of the mean of the sampled <br />area. <br />C.I. = tr~s <br />Performance Standards <br />COVER and HERBACEOUS PRODUCTION: For purposes of comparison only, <br />cover and herbaceous production performance standards were calculated in <br />accordance with procedures contained in the Yoast permit. Aline that indicates <br />90 percent of this standard has been placed on Figures 1 and 2 for informational <br />purposes. At such time as bond release is formally sought, revegetation will be <br />• considered successful for cover when mean cover for a bond release block is at <br />least 90% of the calculated success standard or approved technical standard. <br />WOODY PLANT DENSITY: For purposes of comparisons in this document, <br />woody plant density at the Yoast Mine is evaluated using a technical standard of <br />1,000 shrubs per acre. <br />Climatic Data <br />Precipitation data were collected at the nearby Seneca IIW Mine during the <br />period 1990 through 2005. For years 1982 through 1989, SCC provided <br />precipitation data from the Seneca II Mine. Since the data record for Seneca II <br />exists for only 21 years, the tong term average monthly precipitation data from <br />the Western Regional Climate Center (WRCC) for the nearby town of Hayden <br />was used as an appropriate base for comparison. Information on degree-days <br />was based on temperature data from the Seneca met station 2 at the Seneca IIW <br />Mine. <br />RESULTS <br />