US-89 (SR-89) over Logan River-low Flow Ch.
Cache County, Utah · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US-89 (SR-89) over Logan River-low Flow Ch. in Cache County, Utah, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1969, making it 56 years old at the 2025 inventory.
- It carries about 5,254 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 72 of the 96 inventoried bridges in Cache County rated fair (75.0%); 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 December 2023, on a 19-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (41.76417, -111.67419)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 26 ft |
| Location | 6.3 Miles UP Logan Canyon |
| NBI structure number | 0E1610 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 2023 |
| Inspection interval (item 91) | 19 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
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 |
| US-91 (SR-91) over Blacksmith Fork River | 1958 | 21,964 | Good |
| 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 |
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.