2021-12-22_PERMIT FILE - C1981019 ‎(2)‎

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 12/22/2021
• Doc Name: Salinity Material Damage Assessment
• Section_Exhibit Name: Exhibit 07 Item 16 Salinity Material Damage Assessment
• Media Type: D
• Archive: No

7

above where the irrigation water is diverted to be utilized on these fields. The lab analyzed
data spans from 4/7/1982 to 5/24/2021 and averages 1.72 dS/m (Table 5). If the LGSC
conductance (1.72 dS/m) exceeds the field irrigation water quality thresholds, then a material
damage assessment is warranted.

Table 4 Colowyo - Salinity Study - 2021
Material Damage Assessment
Field Number
Field Salinity
Threshold -
Electrical
Conductivity
(dS/m)
Field Irrigation
Water Quality
Threshold -
Conductance
(dS/m)
Irrigation Water
Quality - LGSC -
Lab Collected Life
of Mine Average
(dS/m)
Material
Damage
Caclulation
Warranted
Cox Fields
1.72 No
1.72 Yes
Summary 3.13 2.10 1.72 No
1.72 No
1.72 No
1.72 No
1.72 No
Summary 3.43 2.30 1.72 No
Proctor Fields
1.72 No
1.72 No
1.72 No
1.72 No
1.72 No
1.72 Yes
1.72 No
Summary 3.72 2.49 1.72 No
Elkhorn & Streeter Fields
3.75 2.51
2.43 1.63
3.25 2.18
3.01 2.02
4.25 2.85
3.93 2.63
5.21 3.49
5.33 3.57
2.60 1.74
2.55 1.71
15
1
2
32.982.00
10
11
12
13
14
4
5
6
73.202.14
3.90 2.61