Bridge ST over Swan River 110
PoorClosed to trafficFlathead County, Montana · S End Big Fork · Structure no. L15672000+02001
- Built
- 1911
- 114 years old
- Condition
- Poor
- inspected June 2023
- Type
- Truss - Thru
- Steel
- Length
- 120 ft
- 1 main span
- Daily traffic
- 1,503
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Bridge ST over Swan River 110 is a steel truss - thru carrying Bridge ST over Swan River 110 in Flathead County, Montana. It was built in 1911, so it is 114 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.
It carries about 1,503 vehicles a day, projected to reach 1,608 by 2043. The structure is 120 ft (36.6 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Bridge ST over Swan River 110 built?
It was built in 1911, making it 114 years old in 2025.
What condition is Bridge ST over Swan River 110 in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.
How much traffic does Bridge ST over Swan River 110 carry?
About 1,503 vehicles per day (2023 count).
How long is Bridge ST over Swan River 110?
The structure is 120 ft (36.6 m) long with a longest span of 119 ft (36.3 m) and a deck 16 ft wide.
Who owns Bridge ST over Swan River 110?
It is owned by the County Highway Agency.