2011-06-02_APPLICATION CORRESPONDENCE - C2010089 ‎(12)‎

• Permit No: C2010089
• IBM Index Class Name: Application Correspondence
• Doc Date: 6/2/2011
• Doc Name: Vegetation Survey
• Section_Exhibit Name: Section 2.04.10
• Email Name: MLT
• Media Type: D
• Archive: No

ID
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document that the number of samples required to describe this site at the 90 percent confidence
interval was 10.2 transects.
Production. The results obtained from the sampling of 50 production transects on this area are
summarized in Appendix Table 2.04.25, Dryland Pasture Reference Area - Production. This
table shows that the average total herbaceous forage production on this site equaled 8.40 g/1 /4
m or 299.4 pounds of air dry forage per acre. Perennial grasses and grasslikes contributed 3.02
g/1 /4 m or 35.95 percent of the herbaceous forage produced on this area. Perennial forbs,
contributed 75.38 g /1/4 m or 64.05 percent of the herbaceous forage production on this area.
The locations of the 50 production transects sampled for this site are shown on Map 2.04.10 -4,
Dryland Pasture Reference Area. The sample adequacy calculations in Appendix Table 2.04.10-
2, New Horizon North Mine Area - Sample Adequacy Calculations, document that the number of
samples required to describe this site at the 90 percent confidence interval was 83.5 transects.
Shrub Density. The shrub density counts obtained from the 15 belt transects sampled in this
area are summarized in Appendix Table 2.04.10 -26, Dryland Pasture Reference Area - Shrub
Density. The average shrub density was determined to equal 24.33 shrubs per one hundred
square meters or 984.6 shrubs per acre. The only woody species encountered in the shrub
sampling of this site were Fourwing Saltbush and Basin Big Sagebrush.
According to the sample adequacy calculations in Appendix Table 2.04.10 -2, New Horizon
North Mine Area - Sample Adequacy Calculations, document that the number of samples
required to describe the shrub density on this site at the 90 percent confidence interval was
1156.1 transects.
RARE AND ENDANGERED PLANTS
Examination of the Colorado Rare Plant Field Guide, published by the Colorado Rare Plant
Technical Committee in 1999 and posted at
http: / /www.cnhp. colostate. edu /download/projects /raeplants, reveals that there are 16 species of
potential Rare or Endangered Plants known to exist in Montrose County or the adjacent portions
of Mesa or San Miguel counties. These include: Adiantum capillus- veneris (Southern maiden-
hair fern; Aletes eastwoodiae (Eastwood desert- parsley); Astragalus linifolius (Grand Junction
milkvetch); Astragalus naturitensis (Naturita milkvetch); Astragalus sesquiflorus (Sandstone
milkvetch); Astragalus wetherillii (Wetherill milkvetch); Epipactis gigantea (Giant helleborine);
Erigeron kachinensis (Kachina daisy); Eriogonum pelinophilum (Clay - loving wild buckwheat);
Gilia penstemonoides (Black Canyon gilia); Lomatium concinnum (Colorado desert- parsley);
Lupinus crassus (Payson lupine); Mimulus eastwoodiae (Eastwood monkey- flower); Penstemon
breviculus (Little penstemon); Penstemon retrorsus (Adode beardtongue) and Sclerocactus
glaucus (Unita Basin hookless cactus).
• Section 2.04.10 Page 24 April2011