Sullivan Bridge RD over Marias River 030
FairGlacier County, Montana · 14M SE Cutbank · Structure no. L18010002+05001
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 283 ft
- 4 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Sullivan Bridge RD over Marias River 030 is a prestressed concrete tee beam carrying Sullivan Bridge RD over Marias River 030 in Glacier County, Montana. It was built in 1968, so it is 57 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 283 ft (86.3 m) long and 15 ft wide. If it were closed, the detour would be 49.7 mi (80 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Sullivan Bridge RD over Marias River 030 built?
It was built in 1968, making it 57 years old in 2025.
What condition is Sullivan Bridge RD over Marias River 030 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 September 2024.
How much traffic does Sullivan Bridge RD over Marias River 030 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Sullivan Bridge RD over Marias River 030?
The structure is 283 ft (86.3 m) long with a longest span of 70 ft (21.3 m) and a deck 15 ft wide.
Who owns Sullivan Bridge RD over Marias River 030?
It is owned by the County Highway Agency.