Laserfiche WebLink
November 2005 Hayden Gulch Mine 'Final Bond Release Application Page 10 <br />2005 Revegetation Sampline Data <br />The 2005 vegetation data are presented in Appendix A.2. Table 2 summarizes the <br />total vegetative cover data for 2005 for the four parcels. Total herbaceous cover in <br />the 2005 reference area samples averaged 47.5 percent -the performance standard <br />is 90 percent of the reference azea mean, which equals 42.8 percent. The pooled <br />total herbaceous cover for the permit area -the four parcels combined -was 56.8 <br />percent (the minimum values is 54.7 percent with 90 percent confidence), which is <br />greater than the performance standard value. A breakdown by individual parcel <br />shows that the total herbaceous cover values for Pazcels E, HG-8, 003 and the <br />Slump Area all exceeded the performance standazd value. <br />The 2005 species diversity data exhibited a trend similar to what was observed in <br />2004. The species diversity of the reference area averaged 14.2 species per 100 sq. <br />m. As shown on Table 3, all four parcels had species diversity values that were <br />similar, but slightly higher than the reference area value. Introduced perennial <br />grasses were again the dominant life form. The reference area had an introduced <br />perennial grass relative percent cover value of 65.6 -the introduced perennial grass <br />relative percent cover value for the four parcels was 72.1 percent. Shrubs were the <br />next most common life farm observed in parcels E, HG-8 and 003. Native <br />perennial grass was the second most common life form at the Slump Area, while <br />introduced perennial fortis were the second most common in the reference azea. <br />As shown on Figure 2, 2004 Woody Plant Density Data, the overall average woody <br />' plant density of the three shrub enclosures (1,767 stems per acre) exceeded the <br />performance standard of 750 stems per acre. <br />' Table 4 presents the 2005 sample adequacy requirements. The reference azea was <br />again sampled using 10 transect, which was both greater than CDMG's requested <br />sample size of five and the sample adequacy requirement. Table 4 also shows that <br />' the combined permit area sample is greater than the sample adequacy requirement. <br />The table also shows that the formula determined minimum sample size <br />requirements were satisfied for Parcel E and Pazcel 003; the minimum sample size <br />' requirement for Parcel HG-8 was just greater than the sample size utilized (nm;,,-6 <br />versus n=5). The Slump Area sample was also slightly less than the formula <br />calculated requirement (nm;~ 5 versus n=3). <br />Reclamation Success Criteria <br />As shown in Table I, the total herbaceous cover satisfied the performance standard <br />requirement for both years (2004: 53.9 percent live cover (with a minimum live <br />cover value of 51.4 percent at 90 percent confidence) versus a performance <br />standard of 47.1 percent; 2005: 56.8 percent live cover (with a minimum live cover <br />value of 54.7 percent at 90 percent confidence) versus a performance standard of <br />42.8 percent). A breakdown of the individual parcels shows that only the Slump <br />Area in 2004 had a cover value that was less than the corresponding reference azea <br />performance standard value. <br />Species diversity data collected in 2004 and 2005 indicates that species diversity in <br />the four small parcels that make up the permit azea is similar to that observed in the <br />