2010-12-08_PERMIT FILE - C1981008A ‎(14)‎

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/8/2010
• Doc Name: Vegetation Information
• Section_Exhibit Name: Section 2.04.10 Vegetation Information NH2 Mine Area
• Media Type: D
• Archive: Yes

total herbaceous production. Total production exceeded that of any vegetation type sampled
(3,500.2 pounds /acre).
The willow component of the Swale /drainage type occurs on shallow, slightly elevated sites that
are better - drained than areas supporting vegetation that can tolerate standing or flowing water,
and completely saturated conditions. No attempt was made to sample cover in the willow
component because of the extremely high shrub densities encountered. Qualitative evaluation
indicated that the canopy and ground cover, including litter, in the willow thickets was equal to
or greater than 100 percent. In more open areas where the willows were less dense,
quackgrass, alkali muhly and common spikerush were prevalent.
Table 2.04.10 -9
Mean Cover (Percent) and Frequency Values For The Swale /Drainage
Vegetation Type, New Horizon 2 Mine Study Area, 1987
Species
Percent Cover
Frequency
Graminoids
Agropyron repens
1.9
10
Agrostis alba
1.8
33
Carex nebrascensis
2.0
7
Carex occidentalis
18.3
43
Eleocharis macrostachya
11.1
53
Hordeum brachyantherum
<0.1
3
Hordeum jubatum
0.2
10
Juncus parryi
2.7
47
Muhlenbergia asperifolia
3.2
27
Phleum pratense
0.7
7
Poa pratensis
0.8
23
Pucinellia lemmoni
0.2
23
Scirpus
11.3
67
Sitanion Longifolium
0.1
10
Total Graminoids
54A
- --
Perennial Forms
Aster adscendens
1.2
50
Centaurea maculosa
<0.1
3
Epilobium ciliatum
0.1
3
Plantago lanceolata
0.4
3
Ranunculus cymbalaria
0.1
3
Rumex crispus
0.3
3
Taraxacum officinale
0.3
3
Trifolium repens
0.2
7
Revised September 2010 (PR 06) 2.04.1041