2018-09-04_PERMIT FILE - C1981019A

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 9/4/2018
• Doc Name: Volume 1 Rule 4
• Section_Exhibit Name: 4.01 Throuugh 4.30
• Media Type: D
• Archive: Yes

RULE 4 PERFORMANCE STANDARDS
NO3-N mg/kg 24.1 19.1 22.3
13.7
18.1
P mg/kg 15 9.6 12
7.8
29
K mg/kg 191 210 201
95.1
105
Ca meq/L 4.9 4.1 4.4
3.5
5.5
Mg meq/L 2.6 1.6 2
2.4
4.1
Na meq/L 0.8 0.6 1.3
1.9
3.5
K meq/L 0.2 0.5 0.4
0.2
0.2
EC mmhos/cm 0.7 0.6 0.7
0.7
1.2
SAR 0.4 0.3 0.8
1.1
1.6
CEC meq/100g 26.8 22.1 22.9
27
23.3
% Sand 41 51 48
39
41
% Silt 23 23 23
23
25
% Clay 36 26 29
35
35
Texture clay loam sandy clay loam sandy clay loam
clay loam
clay loam
aPlot 1 =18 inches of topsoil, strip seeding in alternate rows.
bplot 2 = 6 inches of topsoil and surface manipulation, seeded
with native
shrubs and low
competitive forbs.
°Plot 3 = 6 inches of topsoil, strip seeding in alternate rows.
dplot 4 = Non-topsoiled spoil, strip seeding in alternate rows.
ePlot 5 = Non-topsoiled spoil, seeded with unpalatable native shrubs and low competitive
forbs
and grasses.
To evaluate the impact from wildlife browsing, elk proof fencing was constructed on one-half of
each treatment.
Colowyo Mine Specific Field Trial
At the Colowyo Mine, field trial treatments to be evaluated include five plot treatments as shown
on Figure 4.15-1.
1. 18 inches of live -haul topsoil over spoil with strip seeding. The strip seeding would include
a strip of native shrubs and native low -competitive fortis that would alternate with a strip
of native grasses, forbs, and shrubs. The proposed seed mixtures for this treatment are
presented in data provided in the 2005 Annual Report.
2. 6 inches of live haul topsoil over spoil and seeding with native shrubs and low -competitive
native forbs. Include some surface manipulation to create depressions for enhanced soil
moisture conditions. The proposed seed mixture for this treatment is presented in Table 1.
3. 6 inches of live -haul topsoil over spoil with strip seeding.
4. Non-topsoiled spoil with strip seeding.
5. Non-topsoiled spoil seeded with relatively unpalatable native shrubs, low -competitive
native forbs, and low -competitive native grasses.
Rule 4 Performance Standards 4-52 Revision Date: 5/25/18
Revision No.: RN -07