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Cover <br />The parameter values below reflect sample values for vegetation cover sampling in <br />1996 at the Keenesburg Mine. <br />• <br /> Reference Area 1985 Reclaimed 1986 Reclaimed 1987 Reclaimed <br />bar 43.20 31.20 37.47 37.73 <br />s 4.59 5.39 4.81 4.77 <br />n 15 15 15 15 <br />Nmin 4 9 5 5 <br />kalculated 4.05 0.79 0.65 <br />note: ttable(0.1)(1)(28) value was 1.313 <br />Based on total vegetation sample means, none of the reclamation areas exceeded the <br />total vegetation cover mean of the Osgood Sand Reference Area in 1996. When a <br />Students-t test was performed, the 1986 and 1987 Reclamation Areas were found to be <br />not significantly different in total vegetation cover from the Osgood Sand Reference <br />Area. The total vegetation cover mean from the 1985 Reclamation Area was found to <br />be significantly different from that of the Osgood Sand Reference Area in 1996. <br />The table below summarizes the species composition data obtained from the 1996 <br />sampling at the Keenesburg Mine. Additionally, the current species composition <br />success standard from the Keenesburg CDMG permit is included for reference and <br />comparison. From the 1996 data, only the 1985 Reclamation Area would completely <br />satisfy the current species composition success criterion. Interestingly, the Osgood <br />Sand Reference Area would not satisfy the current species composition success <br />requirements. <br />Species Composition <br /> Success <br />Standard Reference <br />Area 1985 <br />Reclaimed <br />Total Perennial Species '] 5 '7 <br />Warm Season Grasses 4 3 4 <br />Perennial Forbs ] 1 1 <br />Rel. Importance all species 5 7 <br />3To<x<40% <br />1986 <br />Reclaimed 1987 <br />Reclaimed <br />5 6 <br />4 3 <br />0 0 <br />5 6 <br />J <br />