Bridge conditions in Carbon County, Utah
72 inventoried bridges · 2 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 72 bridges in Carbon County: 13 rated good, 57 fair, and 2 poor.
- 2 of the 72 bridges in Carbon County, Utah, are rated in poor condition (2.8%) in the 2025 National Bridge Inventory, as of .
- 13 bridges (18.1%) are rated good and 57 (79.2%) fair.
- The median Carbon County bridge was built in 1979.
- The busiest poor-rated bridge is 6558: Cottonwood C over Nine Mile Creek (built 1994), carrying about 75 vehicles a day.
Good 18.1% · Fair 79.2% · Poor 2.8% of 72 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 |
|---|---|---|---|
| 6558: Cottonwood C over Nine Mile Creek | 1994 | 75 | Poor |
| County Road over Price River | 1914 | 19 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-6 (SR-6) over Price River | 1952 | 15,754 | Fair |
| US-6 (SR-6) over Consumers Wash | 1951 | 15,754 | Fair |
| US-6 (SR-6) over SR-55 | 1985 | 14,196 | Fair |
| SR-55 W.price Conn over Price River | 1977 | 14,181 | Good |
| US-6 (SR-6) over Carbon Canal | 1978 | 14,042 | Fair |
| US-6 (SR-6) over Gordon Creek | 1978 | 14,042 | Fair |
| US-6 (SR-6) Ebl over Price River & Co. Ro | 1978 | 14,042 | Fair |
| US-6 (SR-6) Ebl over County Access Road | 1978 | 14,042 | Fair |
| US-6 (SR-6) Wbl over Price River & Co. Rd. | 1978 | 14,042 | Fair |
| US-6 (SR-6) Wbl over County Access Road | 1978 | 14,042 | 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.