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

4

4.0 CROP YIELD
Total crop yields were available from 2011 to 2020 for the Cox and Elkhorn & Streeter fields
and from 2015 to 2020 for the Proctor fields. Table 3 and Chart 1 display the acreage, total
yield, and tons per acre for the Cox, Elkhorn & Streeter, and Proctor Fields. Since irrigation
water used on these field are junior water rights, when dry years occur, these field often
receive diminished irrigation water, which leads to diminished yields, or no irrigation water at
all. In the Cox fields, the tons per acre yield ranged from 0.1 in 2020 (an exceedingly dry year
and subject to the Streeter Fire) to 2.1 in 2013 and 2014. In the Elkhorn & Streeter fields, the
tons per acre yield ranged from 0.7 in 2020 (an exceedingly dry year) to 2.2 in 2019. In the
Proctor fields, the tons per acre yield ranged from 0.1 in 2020 (an exceedingly dry year and
subject to the Streeter Fire) to 1.2 in 2015. Overall, there does not appear to be systematically
diminishing crop yields, rather crop yields in any given year are more likely result of the
availability and delivery of irrigation water.

Table 3 Colowyo - Salinity Study - 2021
Crop Yield Summary
Field 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Acreage 47.4 47.4 47.4 47.4 47.4 47.4 47.4 47.4 47.4 47.4
Total Yield (Tons)31.1 62.8 99.6 98.3 73.6 65.4 73.0 44.9 68.4 5.0
Tons / Acre 0.71.32.12.11.61.41.50.91.40.1
Acreage 53.5 53.5 53.5 53.5 53.5 53.5 53.5 53.5 53.5 53.5
Total Yield (Tons)75.0 64.0 102.4 97.4 59.8 61.1 74.5 78.0 119.3 38.8
Tons / Acre 1.41.21.91.81.11.11.41.52.20.7
Acreage ----158.1 158.1 158.1 158.1 158.1 158.1
Total Yield (Tons)NA NA NA NA 191.0 165.2 110.0 66.3 133.9 16.6
Tons / Acre ----1.21.00.70.40.80.1
SS10 0.6 6.1 4.1 0.1 2.6 0.1 69 18 14 S andy Loam
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Cox 0.7 1.3 2.1 2.1 1.6 1.4 1.5 0.9 1.4 0.1
Elkhorn & Stre 1.4 1.2 1.9 1.8 1.1 1.1 1.4 1.5 2.2 0.7
Proctor 1.2 1.0 0.7 0.4 0.8 0.1
Annual Precipit 16.7 10.1 13.7 17.3 14.3 11.6 16.4 12.4 16.7 10.2
Proctor
Cox
Elkhorn &
Streeter
0.7
1.3
2.1 2.1
1.6
1.4
1.5
0.9
1.4
0.1
1.4
1.2
1.9
1.8
1.1 1.1
1.4 1.5
2.2
0.7
1.2
1.0
0.7
0.4
0.8
0.1
16.7
10.1
13.7
17.3
14.3
11.6
16.4
12.4
16.7
10.2
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Inches of Precipitation Crop Yield - Tons per Acre
Year
Chart 1 - Crop Yield Summary - 2021
Cox Elkhorn & Streeter Proctor Annual Precipitation (inches)