2009-04-01_REPORT - C1994082 ‎(6)‎

• Permit No: C1994082
• 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

• Total average vegetation cover, for first hits, was 85.9 percent. Total average vegetation cover,
for all hits, was 133.4 percent. Standing dead, litter, bare soil, and rock each had 1.2, 8.9, 3.9,
0.1 percent cover, respectively (first hits). Average species density was 29.5 species per 100
sq.m.
Production
(Table 16)
Total average production was 872.6 Ibs per acre. Native perennial forbs contributed the most
with an average production of 462.2 Ibs per acre. Native perennial cool season grasses
contributed 381.9 Ibs per acre. Three other lifeforms were present with less than 25 Ibs per acre.
SAGEBRUSH EXTENDED REFERENCE AREA
(Photographs35-38)
Cover
(Table 17)
Native shrubs were most abundant in the Sagebrush Reference Area, contributing 30.1 percent
all-hit cover. Within this group, mountain snowberry and big sagebrush were most common,
having 13.7 and 13.5 percent all-hit cover, respectively. Native perennial forbs were the second
most abundant group (17.5 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 4.8 percent all-hit cover. Native perennial cool season
grasses was the third most common life form (16.7 percent all-hit cover). Agassiz bluegrass and
Montana wheatgrass (Elymus lanceolatus fm. albicans) were the most abundant native perennial
cool season grasses (5.7 and 2.1 percent all-hit cover, respectively).
Total average vegetation cover, for first hits, was 62.3 percent. Total average vegetation cover,
for all hits, was 69.9 percent. Standing dead, litter, bare soil, and rock each had 3.6, 19.5, 14.5,
and 0.1 percent cover, respectively (first hits). Average species density was 26.3 species per 100
sq.m.
Production
(Table 18)
Total average production was 781.6 Ibs per acre. Native perennial forbs contributed the most
with an average production of 435.4 Ibs per acre. Native perennial cool season grasses
contributed 276.6 Ibs per acre and introduced perennial cool season grasses contributed 41.0 Ibs
• per acre. Three other lifeforms were present each contributing less than 20 Ibs per acre.
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