US 89 over Dry Fork Marias River
GoodPondera County, Montana · 3M SE Dupuyer · Structure no. P00003070+09701
- Built
- 2006
- 19 years old
- Condition
- Good
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 97 ft
- 1 main span
- Daily traffic
- 518
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 89 over Dry Fork Marias River is a prestressed concrete stringer/multi-beam or girder carrying US 89 over Dry Fork Marias River in Pondera County, Montana. It was built in 2006, so it is 19 years old, younger 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.
It carries about 518 vehicles a day, roughly 6% of them trucks, projected to reach 544 by 2043. The structure is 97 ft (29.7 m) long and 38 ft wide. If it were closed, the detour would be 64 mi (103 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 | 8 Very Good | No problems noted. |
| 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 US 89 over Dry Fork Marias River built?
It was built in 2006, making it 19 years old in 2025.
What condition is US 89 over Dry Fork Marias River 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 2024.
How much traffic does US 89 over Dry Fork Marias River carry?
About 518 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is US 89 over Dry Fork Marias River?
The structure is 97 ft (29.7 m) long with a longest span of 94 ft (28.7 m) and a deck 38 ft wide.
Who owns US 89 over Dry Fork Marias River?
It is owned by the State Highway Agency.