Shamrock DR over Bbwa Canal 039
FairYellowstone County, Montana · Billings-Shamrock DR · Structure no. M56010000+00501
- Built
- 2004
- 21 years old
- Condition
- Fair
- inspected December 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 49 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Shamrock DR over Bbwa Canal 039 is a prestressed concrete tee beam carrying Shamrock DR over Bbwa Canal 039 in Yellowstone County, Montana. It was built in 2004, so it is 21 years old, younger 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.
It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 49 ft (14.9 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 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 Shamrock DR over Bbwa Canal 039 built?
It was built in 2004, making it 21 years old in 2025.
What condition is Shamrock DR over Bbwa Canal 039 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 December 2024.
How much traffic does Shamrock DR over Bbwa Canal 039 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Shamrock DR over Bbwa Canal 039?
The structure is 49 ft (14.9 m) long with a longest span of 49 ft (14.9 m) and a deck 46 ft wide.
Who owns Shamrock DR over Bbwa Canal 039?
It is owned by the County Highway Agency.