REV102680

• Permit No: C1981044
• IBM Index Class Name: Revision
• Doc Date: 10/30/2001
• Doc Name: VEGETATION BASELINE SURVEY AT RAG EMPIRE CORPS EMPIRE MINE PASTURE REFERENCE AREA
• Type & Sequence: TR33
• Media Type: D
• Archive: No

Request For Phase /ii BanA Release d! TmenNnile Conl Comprtm''s Eckmrtn Pnrk & .Nine 1 Arens
' Table A-2
Summary of 2001 Vegetative Cover Values
Empire 1•Iine -Pasture Reference Area
Mean Relative
Vegetative Life-form Cover Cover
' Perennial Grasses 14.86 82.56%
Perennial Forbs (No alfalfa) 0.14 0.78%
' 39%
Sh
0
07 0
b
ru
.
.
s
' Annual Forbs 1.86 10.33%
Alfalfa 1.07 5.94%

' Total 18.00 100%
1
Production - 2001
Determination of sample adequacy for herbaceous production on the Pasture Reference Area was
based upon the "wet weights" of clipped vegetation (Table A-3). Adequacy was reached on the
' Pasture Reference Area with fifteen samples.
Table A-3
' Empire Mine
0.5 square-meter Production Plots
' Summary of 2001 Sample Adequacy Calculations
Mean Field Computed
' "Wet" Weight Standard Actual Adequate
Area (grams) Deviation Sample Size Sample Size
' Pasture Reference Area 92.007 13.13 15 10.42
' The sample mean for herbaceous production values on the Pasture Reference Area is 832.94
pounds/acre. Perelutial grasses constitute the majority of herbaceous production with a relative
production value of 94.37 percent, followed by annual fortis and alfalfa a[ 4.90 percent and 0.54
' percent, respectively. Table A-4 summarizes the relative production for each vegetative life-
form sampled. Table A-6 displays the results of the 2001 sampling event for herbaceous
production on the Pasture Reference Area.
' 2001 Baseline Vegem~ion SmA/• -Empire Minei995/October l8. 200/ A-6