| Hearing Schedule | |||||
| Appellant | Respondent | Case Number | Hearing Date | Type | County |
| Butte Trap & Skeet | DOR | SPT-2025-16 | 10/16/2025 - 1:00 P.M. | SPT | |
| James Achten | DOR | IT-2025-15 | 10/21/2025 - 1:00 P.M. | IT | |
| Billings Generation | DOR | IT-2024-41 | 12/4-12/5/2025 - 8:30 A.M. | IT | |
| Owen H. Orndorff | DOR | IT-2024-52 | 12/4-12/5/2025 - 8:30 A.M. | IT | |
| Robert L. Roberts | DOR | IT-2024-53 | 12/4-12/5/2025 - 8:30 A.M. | IT | |
| Jeffrey L. Smith | DOR | IT-2024-54 | 12/4-12/5/2025 - 8:30 A.M. | IT | |
| DOR | Phillips 66 Company | SPT-2025-10 | 1/26-1/29/2026 - 9:00 A.M. | SPT | Yellowstone |
| Calumet Montana Refining LLC | DOR | SPT-2023-25 | 5/4-5/15/2026 - 9:00 A.M. | SPT | Cascade |
| Calumet Montana Refining LLC | DOR | SPT-2024-50 | 5/4-5/15/2026 - 9:00 A.M. | SPT | Cascade |
| Calumet Montana Refining LLC | DOR | SPT-2024-80 | 5/4-5/15/2026 - 9:00 A.M. | SPT | Cascade |