REP01837

• Permit No: C1981019
• IBM Index Class Name: Report
• Doc Date: 3/10/2000
• Doc Name: 1999 ARR & AHR EXHIBIT 4 REVEGETATION MONITORING
• Permit Index Doc Type: ANNUAL RECLAMATION REPORT
• Media Type: D
• Archive: No

COLOWYO COAL CO. L. P.
1999 REVEGETATION MONITORING
HERBACEOUS COVER (°/,)
RECLAMATION YEAR AND AREA
East Pit Section 1fi .:: ~~ West Pit
SPECIES 1995 1997 1995 1997 1995 1997
Agropyron sibericum 2.9 0.0 1.6 2.0 0.9 1.1
Agropyron dasystachyum 1.6 0.0 2.6 0.4 0.0 0.7
Agropyron intermedium 3.8 0.0 2.6 3.6 6.0 3.3
Agropyron smithii 6.0 6.5 5.9 - 9.2 7.1 4.7
Agropyron trachycaulum 0.7 1.5 1.0 2.0 2.7 2.7
Agropyron trichophorum 0.0 0.0 0.0 0.0 1.1 0.0
Agropyron spp. 0.9 0.2 0.0 0.0 0.2 0.0
Bromus inennis 2.7 1.7 2.3 3.2 1.3 2.4
Bromus marginatus - 10.2 - 6.7 - 12.3 ~ 13.6 .- 10.2 - 11.8
Dacrylis glomerate 0.0 1.2 1.1 3.6 0.4 1.1
Elymus cinerius 0.0 0.0 0.0 0.0 0.2 0.0
Festuca ovine 0.0 0.2 0.0 0.0 1.8 0.2
Phleum pretense 2.2 3.7 2.4 3.2 1.3 0.9
Poa pratensis 1.3 0.0 5.6 11.6 4.2 0.9
ANNUAL GRASSES
Bromus tedorum 1.3 4.3 0.1 0.0 7.6 1.8
PERENNIAL FORBS
Achilles milletolium 7.3 11.8 4.6 9.6 3.1 1.6
Allium textile 0.9 0.0 0.1 0.0 0.0 0.0
Astragalus titer 11.3 5.8 5.9 4.0 5.8 9.8
Cirsium arvense 0.9 0.3 0.0 0.0 0.0 2.2
Linum lewisii 2.4 0.0 1.0 1.2 0.0 1.6
Medicago saliva 0.0 0.0 0.0 0.0 0.2 1.6
Pensteman Palmeri 0.0 0.0 0.3 0.0 0.0 0.9
Penstemon strictus 0.0 0.0 0.0 0.0 0.0 0.2
Stellaria jamesiana 0.0 0.0 0.0 0.4 0.0 0.0
Taraxicum officinale 0.0 0.2 0.0 0.8 0.0 0.0
Vicia Americana 0.2 0.0 0.0 1.2 0.9 0.0
~~.0 1E.1 11,9 17,E lo.o n.9
ANNUAL/BIANNUAL FORBS
Amaranthus blitoides 0.0 0.0 0.0 0.0 0.0 0.2
Cirsium vulgar 0.0 0.0 0.7 0.0 0.7 3.6
Descurainia sophia 0.0 0.8 0.0 0.0 0.0 0.0
Grindelia squarrosa 0.0 0.3 0.0 0.0 0.0 0.0
Lettuce seniola 0.4 0.2 0.3 0.0 0.0 0.0
Melilotus officinalis 0.0 0.2 0.0 0.0 0.0 0.0
Salsola iberica 0.0 0.2 0.0 0.0 0.0 2.7
Thlaspi arvense 0.9 2.2 0.1 0.0 0.0 _ 2.7
Verbascumthapsus 0.0 '; y~ 0.0 0.0 0.8 0.0 9.~ 0.0
-r,,~_ v•~~,tr :.'~ - yX.O ~U,S '7O,Y 5'i.'i 'S8.?
Litter 2.8 2.2 3.0 1.9 3.8 1.4
Rock .13 .27 .09 .04 .04 .15
~, z 6.17 5.72 5.21 7.36 5.6 5.9
s = 2.05 2.04 2.14 1.6 1.6 1.6
t = 2.021 2.004 2.00 2.064 2.021 2.021
N = 45 60 70 25 45 45
N min = 45 51 68 20 31 35
ti ~ ~~ a
9/3!99
Ir~r r~ {
4