Laserfiche WebLink
Achievement of Reveaetation Success <br />Two reports, the 2014 Vegetation Report: Phase III Bond Release Eligible Areas <br />Mountain Coal ComQany. LLC West Elk Mine Somerset, Colorado and the 2015 <br />Vegetation Report Deep Creek Long Draw Long Draw Saddle West Point Road Phase <br />III Bond Release Eligible Areas Mountain Coal Company LLC West Elk Mine <br />Somerset, Colorado that document achievement of the applicable revegetation bond <br />release criteria are appended to this application. <br />A summary of the applicable revegetation success criteria and sampled values for 2014 <br />and 2015 for the West Elk Mine follows. <br />Vegetation Cover <br />The revegetation success criterion for total vegetation cover for the West Elk Mine is a <br />standard based on quantitative sampling over multiple years at the Historic Records <br />Study Area at the West Elk Mine. The final revegetation success criterion for total <br />vegetation cover is 90 percent of 53.04 percent live vegetation cover with 90 percent <br />statistical confidence. <br />West Elk Mine Reclaimed Areas Total Vegetation Cover (2014/2015) <br />Final Total Vegetation Cover Success Criterion: 53.04 % total vegetation cover <br />2014 Sampling 2015 Sampling <br />Xbar <br />69.04 <br />69.10 <br />S <br />8.93 <br />9.78 <br />N <br />23 <br />20 <br />Nmin <br />3 <br />4 <br />Based on the results of the 2014 and 2015 quantitative sampling, the reclaimed areas met <br />the final revegetation total cover vegetation success criterion of 53.04 percent. <br />Total Herbaceous Production <br />The revegetation success criterion for total herbaceous production for the West Elk Mine <br />is a standard based on quantitative sampling over multiple years at the Historic Records <br />Study Area at the West Elk Mine. The final revegetation success criterion for total <br />herbaceous production is 90 percent of 180.38 g/m2 with 90 percent statistical <br />confidence. <br />