REV88839

• Permit No: C1981023
• IBM Index Class Name: Revision
• Doc Date: 1/26/2004
• Doc Name: Letter & Bond Release Application
• From: Greystone
• To: DMG
• Type & Sequence: SL5
• Media Type: D
• Archive: No

Apprndia' A - Vegetation Snnrpling,(or Phose lO 6ard Relense
located and oriented transect is a unique, non-overlapping group of potential sample points. Within each
strata (transect), three randomly determined sample locations were collected. Kaiser believes that the
drought conditions at the site over the past two growing seasons increased the spatial variability of the
vegetation conunuuity on the reclaimed areas, and requests that the data collected, having exceeded the
50 sample threshold, be accepted as valid for the purpose of success standard comparison with production
data collected on the Dryland Reference Area.
RESULTS
Revegetation success for Pltase III Bond Release at the Chimney Rock Mine was evaluated according to
the CDMG, Guideline Regarding Selected Coal Mine Bond Release Issues, April 18, 1995. Vegetation
parameters include: vegetative cover, herbaceous production, and species diversity.
The results discussed in this section pertain to the Dryland Reference Area and the two Dryland
Reclaimed Areas. Transect locations are illustrated on Figures 1, 2, and 3. The analysis and results of
each parameter are contained in the following sections.
Vegetative Cover - 2003
Sample adequacy results for vegetative cover on the Dryland Reference and Reclaimed Areas was based
upon the total amount of live "hits", and is displayed in Table A-1. Evaluation of standard success for
vegetative cover is based upon the sampling conducted on the areas in June of 2003.
TABLE A-1
CHIMNEY ROCK MINE
VEGETATION COVER POINT-INTERCEPT TRANSECTS
SUMMARY OF 2003 SAMPLE ADEQUACY CALCULATIONS

Area Mean Absolute
Vegetation Cover
(percent)
Standard
Deviation Actual
Sample
Size Computed
Adequate
Sample Size
East Pit Reclaimed Area 11.93 2.40 15 8.42
Barren Ridge/Revision 1
Reclaimed Area 1 ].47 3.48 17 16.49
Dryland Reference Area 5.67 1.29 15 9.39
Analysis of vegetative cover to determine revegetation success is based upon live "hits" on approved
species. Results from the summer of 2003 sampling event show that mean absolute vegetation cover is
significantly higher on the East Pit and Barren Ridge/Revision I Reclaimed Areas (11.93 and 11.47
percent respectively) than on the Dryland Reference Area (5.67 percent). Mean vegetative cover by
approved species on the Dryland sampling units were as follows: East Pit Reclaimed Area (7.27 percent);
Barren Ridge/Revision 1 Reclaimed Area (8.23 percent); and the Dryland Reference Area (3.80 percent).
Vegetative cover results from the 2003 samp]ing event satisfy the requirements stipulated in the permit.
Tables A-4, A-6, and A-8 display the results of the 2003 sampling event for vegetative cover on the
Dryland Reference and Reclaimed Areas.
053-ChimneyRock_PH3BOND_2003_(lan.22.04)a A-3