2008-03-27_REPORT - C1994082 ‎(5)‎

• Permit No: C1994082
• IBM Index Class Name: REPORT
• Doc Date: 3/27/2008
• Doc Name: 2007 Revegetation Monitoring Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Reveg Monitoring Report
• Email Name: SB1
• Media Type: D
• Archive: No

. Total average vegetation cover, for first hits, was 74.8 percent. Total average vegetation cover,
for all hits, was 109.2 percent. Standing dead, litter, bare soil, and rock each had 2.6, 15.8, 6.8,
0.0 percent cover, respectively (first hits). Average species density was 39.2 species per 100
sq.m.
Production
(Table 10)
Total average production was 997.5 Ibs per acre. Native perennial forbs contributed the most
with an average production of 579.9 Ibs per acre. Native perennial cool season grasses
contributed 408.6 Ibs per acre. Native annual and biennial forbs and introduced annual and
biennial forbs were also present, each with less than 10 Ibs per acre.
SAGEBRUSH EXTENDED REFERENCE AREA
(Photographsi 7-21)
Cover
(Table 11)
Native shrubs were most abundant in the Sagebrush Reference Area, contributing 28.2 percent
towards total all-hit vegetation cover. Within this group, big sagebrush (Seriphidium tridentatum)
• and mountain snowberry (Symphoricarpos rotundifolius) were most common, having 20.0 and 7.8
percent total all-hit vegetation cover, respectively. Native perennial forbs were the second most
abundant group (17.2 percent all-hit cover) comprised by numerous species with low percent
cover values. Mule's ear (Wyethia amplexicaulis) contributed the highest percent cover value of
the native perennial forbs with 11.2 percent total all-hit vegetation cover. Native perennial cool
season grasses was the third most common life form (15.8 percent all-hit cover). Agassiz
bluegrass (Poa agassizensis) and fescue (Festuca arizonica) were the most abundant native
perennial cool season grasses (5.5 percent and 2.4 percent all-hit cover, respectively).
Total average vegetation cover, for first hits, was 57.8 percent. Total average vegetation cover,
for all hits, was 66.8 percent. Standing dead, litter, bare soil, and rock each had 4.6, 24.8, 12.8,
and 0.0 percent cover, respectively (first hits). Average species density was 27.4 species per 100
sq.m.
Production
(Table 12)
Total average production was 1,052.8 Ibs per acre. Native perennial forbs contributed the most
• with an average production of 585.3 Ibs per acre. Native perennial cool season grasses
contributed 462.2 Ibs per acre and native annual biennial forbs contributed 3.6 Ibs per acre.
10