Simms Fairfield RD over Sun River
GoodCascade County, Montana · Simms · Structure no. S00565000+04501
- Built
- 1983
- 42 years old
- Condition
- Good
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 379 ft
- 4 main spans
- Daily traffic
- 475
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Simms Fairfield RD over Sun River is a prestressed concrete stringer/multi-beam or girder carrying Simms Fairfield RD over Sun River in Cascade County, Montana. It was built in 1983, so it is 42 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 475 vehicles a day, roughly 5% of them trucks, projected to reach 499 by 2043. The structure is 379 ft (115.5 m) long and 34 ft wide. If it were closed, the detour would be 29.8 mi (48 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 Simms Fairfield RD over Sun River built?
It was built in 1983, making it 42 years old in 2025.
What condition is Simms Fairfield RD over Sun 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 December 2023.
How much traffic does Simms Fairfield RD over Sun River carry?
About 475 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Simms Fairfield RD over Sun River?
The structure is 379 ft (115.5 m) long with a longest span of 95 ft (29 m) and a deck 34 ft wide.
Who owns Simms Fairfield RD over Sun River?
It is owned by the State Highway Agency.