John G Mine RD over Helena Valley Canal 116
GoodPosted for loadLewis and Clark County, Montana · 6M NW Helena · Structure no. L25658000+05001
- Built
- 1958
- 67 years old
- Condition
- Good
- inspected February 2025
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 29 ft
- 1 main span
- Daily traffic
- 795
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
John G Mine RD over Helena Valley Canal 116 is a wood or timber stringer/multi-beam or girder carrying John G Mine RD over Helena Valley Canal 116 in Lewis and Clark County, Montana. It was built in 1958, so it is 67 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.
It carries about 795 vehicles a day, roughly 3% of them trucks, projected to reach 847 by 2043. The structure is 29 ft (8.8 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was John G Mine RD over Helena Valley Canal 116 built?
It was built in 1958, making it 67 years old in 2025.
What condition is John G Mine RD over Helena Valley Canal 116 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.
How much traffic does John G Mine RD over Helena Valley Canal 116 carry?
About 795 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is John G Mine RD over Helena Valley Canal 116?
The structure is 29 ft (8.8 m) long with a longest span of 26 ft (7.9 m) and a deck 27 ft wide.
Who owns John G Mine RD over Helena Valley Canal 116?
It is owned by the County Highway Agency.