US-91 (SR-91) over Blacksmith Fork River
GoodCache County, Utah · South Edge of Logan · Structure no. 0D 597
- Built
- 1958
- 67 years old
- Condition
- Good
- inspected July 2023
- Type
- Frame
- Concrete
- Length
- 57 ft
- 1 main span
- Daily traffic
- 21,964
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US-91 (SR-91) over Blacksmith Fork River is a concrete frame carrying US-91 (SR-91) over Blacksmith Fork River in Cache County, Utah. It was built in 1958, so it is 67 years old, older than the Utah average of 40.1 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 21,964 vehicles a day, roughly 12% of them trucks, projected to reach 26,357 by 2041. The structure is 57 ft (17.3 m) long and 80 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-91 (SR-91) over Blacksmith Fork River built?
It was built in 1958, making it 67 years old in 2025.
What condition is US-91 (SR-91) over Blacksmith Fork 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 July 2023.
How much traffic does US-91 (SR-91) over Blacksmith Fork River carry?
About 21,964 vehicles per day (2021 count), of which roughly 12% are trucks.
How long is US-91 (SR-91) over Blacksmith Fork River?
The structure is 57 ft (17.3 m) long with a longest span of 50 ft (15.2 m) and a deck 80 ft wide.
Who owns US-91 (SR-91) over Blacksmith Fork River?
It is owned by the State Highway Agency.