2025-08-28_HYDROLOGY - M1983194 ‎(7)‎

• Permit No: M1983194
• IBM Index Class Name: Hydrology
• Doc Date: 8/28/2025
• From: NSI
• To: EPA
• Archive: No

Natural Soda LLC 2024 Project Status Report & Annual Plan of Development
17 January 2025
Table 3: List and Status of Wells Associated with NS (Confidential)
Well Name Initial Well Type Current Well
Status Section Town-
ship Range Latitude
(NAD 27)
Longitude
(NAD 27)
Initial
TD,
(MD, ft)
Current
TD,
(MD, ft)
Comments
12H-I Horizontal-Injection Horizontal-
Production 25 1S 98W 39.929304000 108.348621000 4189.0 4189 TVD TD=~1985’
12H-R Horizontal-Recovery Horizontal-
Recovery 25 1S 98W 39.929598000 108.348538000 2623.0 2623 TVD TD=~2007'
12H-IR Horizontal-Production
(Inj/Rec)
Horizontal-
Production 26 1S 98W 39.929667896 108.363801054 3464.7 3464.7 TVD TD=-1972’
13H-R(I) Horizontal-Production
(Inj/Rec)
Horizontal-
Production 25 1S 98W 39.929583170 108.348684400 2549 2549 TVD TD=~2013’
13H-IR Horizontal-Production
(Inj/Rec)
Horizontal-
Production 26 1S 98W 39.930014690 108.363712457 3423.7 3423.7 TVD TD=-1964’
14H-1V Slant Production
(Rec)
Subsurface
Subsidence
Monitoring)
26 1S 98W 39.931733549 108.35641781 2095.5 2095.5
15H-R(I) Horizontal Production
(Inj/Rec)
Horizontal-
Production 34 1S 98W 39.927050806 108.370714984 2698 2698 TVD TD=~1850’
15H-1V Slant Production
(Rec)
Slant Production
(Rec) 26 1S 98W 39.92797980 108.36112812 2079.1 2079.1 TVD TD=~1922’
15H-IR-E Horizontal Production
(Inj/Rec)
Horizontal
Production 25 1S 98W 39.92778393 108.34898748 4032.4 4032.4 TVD TD=~1960’
15H-SSMW
Subsurface
Subsidence
Monitoring
Subsurface
Subsidence
Monitoring
26 1S 98W 39.927297800 108.367304200 1760.5 1760.5
16H-I Horizontal Injection Horizontal-
Injection 34 1S 98W 39.926332533 108.371061443 5425 5425 TVD TD=~1910’
16H-1V Slant Production
(Rec)
Slant Production
(Rec) 35 1S 98W 39.925742470 108.363769248 2086 2086 TVD TD= ~1945’
16H-IR-E Horizontal Production
(Inj/Rec)
Horizontal
Production 25 1S 98W 39.927419470 108.349138051 4025 4011 TVD TD= ~1959’
17H-1V Slant Production
(Rec)
Slant Production
(Rec) 35 1S 98W 2376.7 2376.7 2376.7 2376.7 TVD TD= ~1961’
17H-IR-E Horizontal-Production
(Inj/Rec)
Horizontal-
Production
(Inj/Rec)
36 1S 98W 39.9270577 108.349382 3994.7 3994.7 TVD TD=-1965’
17H-R(I) Horizontal-Recovery Horizontal-
Recovery 34 1S 98W 39.926171184 108.370365216 2431.7 2431.7 TVD TD=-1872’
17H-E SSMW
Subsurface
Subsidence
Monitoring
Subsurface
Subsidence
Monitoring
35 1S 98W 39.92601271 108.3531506 1828 1828
17H-SSMW
Subsurface
Subsidence
Monitoring
Subsurface
Subsidence
Monitoring
35 1S 98W 39.925620961 108.367424479 1731.0 1720.6
18H-1V Slant Production
(Rec)
Subsurface
Subsidence
Monitoring)
35 1S 98W 39.924318000 108.356904000 2432.0 2432.0 TVD TD = ~1999’
18H-IR-W Horizontal-Production
(Inj/Rec)
Horizontal-
Production
(Inj/Rec)
34 1S 98W 39.925250827 108.370220309 4526.3 4526.3 TVD TD = ~1924
18H-IR-WA Horizontal Production
(Inj/Rec) (P&A 2024)
Horizontal
Production 34 1S 98W 39.925357110 108.370197700 2201.4 0 TVD TD = ~1869
P&A July 2024
89-1 Hydrology Monitoring Hydrology
Monitoring Well 26 1S 98W 39.934818008 108.359830288 1989 1570
89-2 Hydrology Monitoring Hydrology
Monitoring Well 26 1S 98W 39.934771572 108.359655360 1409 1389
89-3 Hydrology Monitoring Hydrology
Monitoring Well 26 1S 98W 39.934959857 108.359876003 400 390 Periodic sampling
issues
WSW-2
(2010-26-198-
2C)
Core Hole Water Supply 26 1S 98W 39.932913043 108.357000636 1964 1402 Cored July 2010
WSW-3 Water Supply Water Supply 26 1S 98W 39.940837450 108.361799400 1440 1440 Drilled August 2014
WSW-4 Water Supply Water Supply 26 1S 98W 39.940358200 108.348198508 1437 1437 Drilled August 2014
90-3 Hydrology Monitoring Hydrology
Monitoring Well 26 1S 98W 39.927659529 108.363196386 1577 1556