2008-05-12_REVISION - C1980005 ‎(4)‎

• Permit No: C1980005
• IBM Index Class Name: REVISION
• Doc Date: 5/12/2008
• Doc Name: Bond Release Application
• From: Seneca Coal Company
• To: DRMS
• Type & Sequence: SL3
• Email Name: DTM
• Media Type: D
• Archive: No

Seneca Coal Company
Phase 11 Bond Release Request
This value is greater than the 90 percent of the approved standard (0.9 X 70% = 63%), thus
BRB-2 passes Alternative Test C.
To satisfy Altemative Test C for BRB-3, the similarity index for BRB-3 compared to the
mountain brush reference area is:
Species Density/100m2
Life Form BRB-3 MB Ave
Annual/Biennial Forbs 7.4 4.0
Annual Grasses 1.2 02
Perennial Forbs 6.6 15.9
Perennial Cool Season Grasses 6.4 6.6
ISmoMB= ((4.0+0.2+6.6+6.4)2)/(7.4+4.0+ 1.2+0.2+6.6+ 15.9+6.4+6.6) _
71.2%
To satisfy Alternative Test C for BRB-3, the similarity index for BRB-3 compared to the
sagebrush reference area is:
Species Density/100m2
Life Form BRB-3 SB Ave
Annual/Biennial Forbs 7.4 3.1
Annual Grasses 1.2 0.0
Perennial Forbs 6.6 14.7
Perennial Cool Season Grasses 6.4 8.3
ISmoMB=((3.1+0.0+6.6+6.4)2)/(7.4+3.1+1.2+0.0+6.6+14.7+6.4+8.3)=
67.5%
The weighted average similarity for the reference areas to BRB-3 is:
67.5% x 0.17 + 71.2% X 0.83 = 70.6 °,~o
This value is greater than the 90 percent of the approved standard (0.9 X 70% = 63%), thus
BRB-3 passes Alternative Test C.
May2008
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