2011-06-03_REVISION - C1980005

• Permit No: C1980005
• IBM Index Class Name: REVISION
• Doc Date: 6/3/2011
• Doc Name: Submittal of updated vegetation monitoring results
• From: Seneca Coal Company
• To: DRMS
• Type & Sequence: SL5
• Email Name: JDM
• Media Type: D
• Archive: No

Allowable Annual Cover 7.10
Actual Annual Cover (w/o noxious annuals) - 1.13
Non-allowable Annual Cover (zero in
calculations below if positive) 6.0
ALLOWABLE FIRST-H IT COVER
CALCULATION
Total First Hit Vegetation Cover 71.10
Noxious Weed Cover - 0.07
Total Minus Noxious 71.03
Excess Non-allowable Annual Cover
Deduction - 0.0
Woody Plants - Not Allowed 26.3
Mean Allowable Cover 44.73
Standard Deviation of Mean Allowable Cover 8.83
Sample Size 15
Minimum Adequate Sample Size 8
PHASE I I BOND RELEASE BLOCK (TABLE 6-1, APPENDIX 6)
ANNUAL DEDUCTION CALCULATION:
Total First Hit Vegetation Cover 44.40
Noxious Weed Cover 0.95
Total Minus Noxious 43.45
Allowable Annual Cover Limit X 0.1
Allowable Annual Cover 4.35
Actual Annual Cover (w/o noxious annuals) - 6.33
Non-allowable Annual Cover (zero in -2.0
calculations below if positive)
ALLOWABLE COVER CALCULATION
Total First Hit Vegetation Cover 44.40
Noxious Weed Cover - 0.95
Total Minus Noxious 43.45
Excess Non-allowable Annual Cover Deduction 2.0
Woody Plants - Not Allowed - 1.5
Mean Allowable Cover 40.0
Standard Deviation of Mean Allowable Cover 9.39
Sample Size 21
Minimum Adequate Sample Size 10
Assessment of BRB for Compliance with Phase H Performance Standards
Calculation of 90 percent of the cover performance standard appropriate for 2010 sampling is
demonstrated below and is based on the following information:
12