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REP47480
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REP47480
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Last modified
8/25/2016 12:51:06 AM
Creation date
11/27/2007 12:04:05 PM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981021
IBM Index Class Name
Report
Doc Date
8/1/1990
Doc Name
1990 EVALUATION OF REVEGETATION SUCCESS AT THE WALDEN COAL CO MINE SITE
Permit Index Doc Type
ANNUAL RECLAMATION REPORT
Media Type
D
Archive
No
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<br />increased from 9.3 percent in 1989 to 21.1 percent in 1990. In this <br />same time period, cover by annual forbe decreased from 6.6 to 3.3 <br />percent (Table 4). Mean total vegetation cover increased from 16.1 <br />percent in 1989 to 33.3 percent in 1990; cover by litter and rock <br />combined decreased from 57.4 percent to 33.6 percent; and cover by bare <br />soil increased from 26.4 percent to 33.1 percent. Total ground cover <br />decreased slightly from 73.6 percent to 66.9 percent. <br />When the data from the two areas are combined (Table 6), the cover <br />trends are mostly influenced by the changes that occurred in the area e• <br />seeded in 1988. The data show increases for perennial grasses and also <br />a twofold increase in cover by big sagebrush. Total vegetation cover <br />increased from 18.4 percent in 1989 to 30.8 percent in 1990; cover by <br />litter and rock combined decreased from 54.2 percent to 37.3 percent; <br />and cover by bare soil increased from 27.4 percent to 31.9 percent. <br />Total ground cover decreased slightly from 72.6 percent in 1989 to 68.1 <br />percent in 1990. <br />Both areas showed increases in the mean number of species per <br />traneect. For the two areas combined, the mean number of species per <br />traneect increased from 4.45 in 1989 to 5.35 in 1990. <br />COMMENTS <br />After two years of sampling, it appears that the revegetation of <br />the disturbed lands at the Bite is quite successful. Increases in cover <br />by perennial grasses and also by big sagebrush suggest that over time <br />the reclaimed areas will begin to resemble the surrounding native big <br />sagebrush ehrublands. <br />
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