2018-06-05_PERMIT FILE - C1981019A ‎(7)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 6/5/2018
• Doc Name: Volume 1 Rule 4
• Section_Exhibit Name: 4.02 Throuugh 4.30
• Media Type: D
• Archive: Yes

RULE 4 PERFORMANCE STANDARDS
Seed Mix - Buried Topsoil Test Plot Seed Mix - Colowyo Mine - 2006
Recommended
s
Species
Synonym
Common Name
Seeds/ Ib.
lbs. / acre
sq. foot
Agropyron dasystachyum
Elymus lanceolatus ssp. larxeolatus
Thickspike Wheatgrass
154,000
0.25
0.88
Agropyronsmiffiv
Pascopyrumsmithu
Western Wheatgrass
110,000
0.25
0.63
Agropyron sp-tum irrerme
Pseudoroegneria sp-ta ssp. merme
Beardless Bluebunch Wheatgrass
117,000
0.50
1.34
Agropyron trachycaulum
Elymus trachycaulus ssp. trachycaulus
Slender Wheatgrass
159,000
0.50
1.83
Poa ampla
Big Bluegrass
882,000
0.10
2.02
Subtotal =
1.60
6.71
Achrllea mdlifollum
Western Yarrow
2,770,000
0.10
6.36
Artemisia ludowaana
Louisiana Sagewort
33,600
0.75
0.58
v
Asterchilensis
Vrgulasterascendens
Pacific Aster
2,668,000
0.10
6.12
Linum lewisn
Lewis Flax
293,000
0.20
1.35
Artemisia fndgida
Fringed Sage
4,536,000
0.05
5.21
Penstemon strxtus
Rocky Mountain Penstemon
592,000
0.20
2.72
Subtotal =
1.40
22.33
Amelanchieralnifolia
Saskatoon Serviceberry
25,800
1.50
0.89
Artemtsa trrdentata vaseyana
Mountain Big Sagebrush
2,500,000
0.25
14.35
„
Artemisia cans
Silver Sagebrush
850,000
0.75
14.63
Atnplex canescens
Fourwing Saltbush
52,000
1.00
1.19
Ceratoideslanata
Wnnterfat
56,700
2.00
2.60
m
Chrysothamnusnauseosus
Rubber Rabbitbrush
400,000
0.50
4.59
Purshia tridentate
Bitterbrush
15,000
3.00
1.03
Rosa woodsii
Wood's Rose
45,300
1.50
1.56
S m srotundifoliius
Mountain Snowberry
75,000
1.50
2.58
1 Subtotal =112.00
43.44
Total 1
15.00
72.48
At the peak of each subsequent growing season, or shortly thereafter, for a period of at least 5 years, these
test plots were to be evaluated for emergent shrub density, ground cover by species, and a visual
evaluation of surficial erosion. This data would be reported annually in the Annual Reclamation Report.
If data shows that there is promise as a shrub conducive reclamation procedure, DRMS may be contacted
to initiate alternate reclamation procedures for the remainder of Colowyo reclamation.
As of March, 2008, these test plots had not been constructed because of the impending revision to the
reclamation plan. Because of this revision and the reasonable promise of success for the new proposed
procedures, construction of these test plots has been placed "on -hold" until as such time as they may
become necessary.
Aspen and Tall Shrub Establishment Areas
As a result of negotiations with CDOW and DRMS regarding approval of TR -72, and the development of
TR -84, Colowyo has committed to implementing three field trials. Based upon initial estimates of
disturbance to aspen and tall shrub habitats in the South Taylor area, a determination was made that the
establishment of 20 acres of aspen habitat and 20 acres of tall shrub habitat (combination of thin and thick
topsoil locations) be established in the South Taylor reclamation area (mining disturbance area). As a
result of subsequent changes to the mine plan, approximately (7% or 14 acres) of the aspen and (41% or
347 acres) of the tall shrub habitat previously targeted for disturbance will no longer be affected. A
reduced area of (18.5) acres of aspen and (12.0) acres of tall shrubs will now be pursued at Colowyo. The
field trials are meant to provide information to Colowyo, DRMS and the CDOW about the appropriate
expectations for success/failure of establishing these habitat types at Colowyo in the context of a ten year
bond clock and also to provide some baseline information that can be used to modify practices and the
plant materials used to meet the current expectations (acres of each habitat type identified above).
Another potential use of the information provided by these trials may be to provide Colowyo with an
avenue for relief of the aspen and tall shrub establishment area expectations for South Taylor should
efforts prove to be unsuccessful despite the incorporation of best management practices.
The standard interim revegetation monitoring techniques and practices (performed by a third party)
applied to the other reclamation areas at Colowyo will be utilized annually to measure progress of the
Rule 4 Performance Standards 4-48 Revision Date: 1/31/18
Revision No.: TR -119