2009-04-01_REPORT - C1982057 ‎(6)‎

• Permit No: C1982057
• IBM Index Class Name: REPORT
• Doc Date: 4/1/2009
• Doc Name: 2008 Annual Revegetation Monitoring Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Reveg Monitoring Report
• Email Name: DTM
• Media Type: D
• Archive: No

• MOUNTAIN BRUSH EXTENDED REFERENCE AREA
(Photographs 42-46 in Appendix 5)
Cover
(Table 10)
Native shrubs were most abundant, comprising 66.7 percent toward the total 101.4 percent
vegetation cover (all hits). Within this group, Gambel's oak (Quercus gambelii), mountain
snowberry and chokecherry were most common, having 34.0, 17.5, and 8.6 percent cover,
respectively. Native perennial cool season grasses were the second most abundant group
contributing 17.8 percent all-hit vegetation cover, dominated by Agassiz bluegrass (Poa
agassizensis) (7.7 percent cover) and elk sedge (Carex geyen) (3.6 percent cover). Native
perennial forbs were the third most abundant lifeform contributing 13.8 percent all-hit cover,
having numerous species with low percent cover values and no dominant species. Tailcup lupine
(Lupinus caudatus), American vetch (Vicia americana), and western yarrow (Achillea lanulosa)
had the highest percent cover values of this group (2.5, 2.3, and 2.0 percent, respectively).
Total average vegetation cover, for first hits, was 72.9 percent. Total average vegetation cover,
for all hits, was 101.4 percent. Standing dead, litter, bare soil, and rock each had 1.4, 14.7, 10.7,
and 0.3 percent cover, respectively (first hits). Average species density was 30.7 species per 100
sq.m.
Production
(Table 11)
Total average production was 863.6 Ibs per acre. Native perennial cool season grasses
contributed the most with an average production of 515.7 Ibs per acre. Native perennial forbs
contributed 324.8 Ibs per acre. Native annual and biennial forbs, introduced annual and biennial
forbs and introduced annual grasses were also present, each with less than 11 pounds per acre.
SAGEBRUSH EXTENDED REFERENCE AREA
(Photographs 47-52 in Appendix 5)
Cover
(Table 12)
Native shrubs were the most abundant lifeform in the Sagebrush Extended Reference Area,
making up 41.5 percent toward the total 77.7 percent vegetation cover (all hits). Within this
group, big sagebrush and mountain snowberry were most common, having 20.1 and 18.6 percent
all-hit cover, respectively. Native perennial forbs were the second most abundant group
contributing 18.8 percent all-hit cover, comprised by numerous species with low percent cover
values and lacking dominant species. Tailcup lupine and arrowleaf balsamroot (Balsamorhiza
• sagittata) had the highest percent cover values of the native perennial forbs (3.4 and 3.3 percent
all-hit cover respectively). Native perennial cool season grasses were the third most common life
10