Glass DR over Helena Valley Canal 150
FairPosted for loadLewis and Clark County, Montana · 11M N Helena · Structure no. L25128001+09001
- Built
- 1958
- 67 years old
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 22 ft
- 1 main span
- Daily traffic
- 611
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Glass DR over Helena Valley Canal 150 is a wood or timber stringer/multi-beam or girder carrying Glass DR over Helena Valley Canal 150 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 611 vehicles a day, projected to reach 642 by 2043. The structure is 22 ft (6.8 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Glass DR over Helena Valley Canal 150 built?
It was built in 1958, making it 67 years old in 2025.
What condition is Glass DR over Helena Valley Canal 150 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2024.
How much traffic does Glass DR over Helena Valley Canal 150 carry?
About 611 vehicles per day (2023 count).
How long is Glass DR over Helena Valley Canal 150?
The structure is 22 ft (6.8 m) long with a longest span of 21 ft (6.5 m) and a deck 27 ft wide.
Who owns Glass DR over Helena Valley Canal 150?
It is owned by the County Highway Agency.