| Document Type | Document Title | Date | Remarks |
| Application Map | Application HE331 Map Image | | |
| Certificate | Certificate 76861 Image | 4/17/2001 | |
| Order | Order Image - Volume: 121 Page: 20 | 7/23/2021 | EXTENDING THE EXPIRATION DATES OF HYDROELECTRIC WATER RIGHT HE 331 |
| Order | Order Image - Volume: 122 Page: 188 | 12/30/2021 | EXTENDING THE EXPIRATION DATE OF HE 238, 247, 250, 251, 296, 314, 331, 346, 349 AND 507 |
| Order - Proposed Final | HE 331 PFO | 6/11/2024 | |
| Order | Order Image - Volume: 129 Page: 1215 | 8/9/2024 | WITHDRAWAL OF INSTREAM WATER RIGHT PROPOSED FINAL ORDERS FOR HE 251, HE 278, HE 331, & HE 318 |
| Order - Proposed Final | HE 331 PFO with Proposed Certificate | 9/23/2025 | |
| Order - Final | HE 331 FO | 4/10/2026 | |