US HWY 91 N over Dry Fork Marias 080
FairPondera County, Montana · 2M N Conrad · Structure no. L37302002+06001
- Built
- 1931
- 94 years old, rebuilt 1951
- Condition
- Fair
- inspected November 2024
- Type
- Tee Beam
- Concrete
- Length
- 114 ft
- 3 main spans
- Daily traffic
- 511
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US HWY 91 N over Dry Fork Marias 080 is a concrete tee beam carrying US HWY 91 N over Dry Fork Marias 080 in Pondera County, Montana. It was built in 1931 and reconstructed in 1951, so it is 94 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 5 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 511 vehicles a day, roughly 3% of them trucks, projected to reach 539 by 2043. The structure is 114 ft (34.7 m) long and 31 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 | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US HWY 91 N over Dry Fork Marias 080 built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1951.
What condition is US HWY 91 N over Dry Fork Marias 080 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 US HWY 91 N over Dry Fork Marias 080 carry?
About 511 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is US HWY 91 N over Dry Fork Marias 080?
The structure is 114 ft (34.7 m) long with a longest span of 37 ft (11.3 m) and a deck 31 ft wide.
Who owns US HWY 91 N over Dry Fork Marias 080?
It is owned by the State Highway Agency.