US-91 (SR-91) over Blacksmith Fork River
Cache County, Utah · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US-91 (SR-91) over Blacksmith Fork River in Cache County, Utah, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1958, making it 67 years old at the 2025 inventory.
- It carries about 21,964 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 17 of the 96 inventoried bridges in Cache County rated good (17.7%); 7 (7.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2023, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (41.70417, -111.85056)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Concrete frame |
| Length | about 56 ft |
| Location | SOUTH EDGE of LOGAN |
| NBI structure number | 0D 597 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 7: scour countermeasures installed |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Utah department of transportation.
Busiest bridges in Cache County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-91 (SR-91) over Logan River | 1918 | 44,297 | Fair |
| SR-252 1000 W.St. over Logan River | 1978 | 17,023 | Fair |
| US-91 (SR-91) over Little Bear River | 1947 | 16,370 | Fair |
| 1000 South St. over Logan River | 1994 | 14,995 | Fair |
| SR-165 over Blacksmith Fork River | 1991 | 14,329 | Good |
| 600 E. and 800 N. over Logan-northern Canal | 1995 | 10,076 | Fair |
All bridges nearby: Cache County, UT bridge conditions · every bridge in Cache County · Utah bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.