Proposal to upgrade the Red Mountain Flume by replacing its final 2.5 miles with a buried pipe, eliminating major water loss and improving the reliability of Helena's drinking water supply from Banner Creek to the Ten Mile Water Treatment Plant.
Location
Ten Mile Creek Drainage
Project timeline
1
Scoping Start
06/16/2025
2
Decision
06/2025 (Estimated)
3
Implementation
07/2025 (Estimated)
NEPA / regulatory detail
| Categorical Exclusion | 32.2 (3), 36 Cfr 220.6(E)(3) |
| Special Authority | Not Applicable / Other |
| Notice and Comment Regulation | Not Subject to Regulations |
| Project Activity | Special Area Management |
| City of Helena Red Mountain Flume Repair and Burial Decision Memo | Decision Signed Date: 06/27/2025 |
| Forests | Lewis And Clark National Forest |
| Districts | Helena Ranger District |
| Legal Land Description | T 8 N, R. 5 W, Sec. 2, 3, 4, & 9 |