Bridge conditions in Cache County, Utah
96 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Cache County tracks close to typical: 7 of its 96 inventoried bridges (7.3%) are rated poor, against a national rate of about 7%.
- 7 of the 96 bridges in Cache County, Utah, are rated in poor condition (7.3%) in the 2025 National Bridge Inventory, as of .
- 17 bridges (17.7%) are rated good and 72 (75.0%) fair.
- The median Cache County bridge was built in 1974.
- The busiest poor-rated bridge is Logan City Street over Logan River (built 1983), carrying about 4,505 vehicles a day.
Good 17.7% · Fair 75.0% · Poor 7.3% of 96 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Logan City Street over Logan River | 1983 | 4,505 | Poor |
| SR-61 over Bear River | 1961 | 1,170 | Poor |
| County Road over Bear River | 1925 | 315 | Poor |
| Road 20012 over Logan River | 1968 | 50 | Poor |
| Road 20024 over Logan River | 1972 | 50 | Poor |
| Road 20157 over Lt Hd Fork Blacksmith | 1954 | 50 | Poor |
| Road 20264 over Logan River | 1951 | 50 | Poor |
Busiest bridges in the 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 |
| 600 E. and 800 N. over Logan-northern Canal | 1995 | 10,076 | Fair |
| SR-30 over Little Bear River | 1995 | 8,955 | Fair |
| US-89 (SR-89) over Logan River | 1998 | 8,608 | Fair |
| US-89 (SR-89) over Logan River | 1997 | 8,608 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Utah: Utah bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.