REV10470

• Permit No: C1980003
• IBM Index Class Name: Revision
• Doc Date: 2/27/1998
• Doc Name: PH II/III BRA EXHIBIT 1
• From: VEGETATION STUDY FOR FINAL BOND RELEASE
• Type & Sequence: SL3
• Media Type: D
• Archive: No

Table 4b. Statistical Evaluations for the Revised Reclaimed and Reference Area Data on
the H-G Coal Mine Study Area, 1996.
Parameters
Study Area X S N Nmin
Reclamation
Vegetation Cover (%) 77.9 7.9 13 2
Ground Cover (%) 96.2 4.9 13 1
Production (g/mZ) 164.4 54.7 16 20
Shrub Density (#/T) 7.4 11.1 89 371 *
Aspen Reference
Vegetation Cover (%) 79.2 4.4 10 1
Ground Cover (%) 96.0 3.5 10 1
Production (g/m2) 95.7 22.7 20 10
Chokecherry Reference
Vegetation Cover (%) 80.6 5.7 10 1
Ground Cover (%) 95.6 3.4 10 1
• Production (g/m2) 107.3 23.0 20 9
Oak brush Reference
Vegetation Cover (%) 75.0 4.9 10 1
Ground Cover (%) 94.2 2.4 10 1
Production (g/mZ) 108.5 26.7 21 11
Sagebrush Reference
Vegetation Cover (%) 69.2 8.5 10 3
Ground Cover (%) 93.6 4.5 10 1
Production (g/mz) 63.7 12.2 10 1
X =Mean
S =Sample Standard Deviation
N =Number of Samples Collected
Nmin =Number of Samples needed to meet sample adequacy
=Percent
#!T =Number per Transect
* =Minimum Number Calculated with " Standazd" t-test Method
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