Bridge conditions in Carbon County, Wyoming
206 inventoried bridges · 19 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 206 bridges in Carbon County: 64 rated good, 123 fair, and 19 poor.
- 19 of the 206 bridges in Carbon County, Wyoming, are rated in poor condition (9.2%) in the 2025 National Bridge Inventory, as of .
- 64 bridges (31.1%) are rated good and 123 (59.7%) fair.
- The median Carbon County bridge was built in 1969.
- The busiest poor-rated bridge is I-80 Wbl over E F Medicine Bow River (built 1969), carrying about 6,267 vehicles a day.
Good 31.1% · Fair 59.7% · Poor 9.2% of 206 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 |
|---|---|---|---|
| I-80 Wbl over E F Medicine Bow River | 1969 | 6,267 | Poor |
| I-80 Ebl over Cb CR 15 (Cooper Cove) | 1969 | 6,029 | Poor |
| I-80 Ebl over E F Medicine Bow River | 1969 | 5,952 | Poor |
| Wyo 74 over North Platte River | 1963 | 4,391 | Poor |
| S 6th Street over UPRR | 1966 | 1,990 | Poor |
| I-80 Service Road over North Platte River | 1930 | 782 | Poor |
| Cb Cnty Rd 702 over Muddy Creek | 1976 | 132 | Poor |
| Cb Cnty Rd 203 over North Platte River | 1930 | 97 | Poor |
| Cb Cnty Rd 270 over Difficulty Creek | 1985 | 97 | Poor |
| Cb Cnty Rd 680 over Encampment River | 1915 | 71 | Poor |
| Cb Cnty Rd 660 over North Platte River | 1915 | 69 | Poor |
| Cb Cnty Rd 608 over Cow Creek | 1950 | 67 | Poor |
| Cb Cnty Rd 3 over Third Sand Creek | 1965 | 59 | Poor |
| Cb Cnty Rd 3 over Medicine Bow River | 1915 | 59 | Poor |
| Cb Cnty Rd 1 over Medicine Bow River | 1982 | 59 | Poor |
| Cb Cnty Rd 402 over Rock Creek | 1985 | 53 | Poor |
| Texas Trail over North Platte River | 1929 | 50 | Poor |
| Cb Cnty Rd 603 over Four Mile Creek | 1991 | 44 | Poor |
| Cb Cnty Rd 109 over Mill Creek | 1940 | 2 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-80 Wbl over West Sinclair Intg | 2000 | 7,909 | Good |
| I-80 Wbl over UPRR / Wyo 76 | 2000 | 7,909 | Good |
| I-80 EBL and WBL over Sugar Creek | 2000 | 7,637 | Fair |
| I-80 Ebl over West Sinclair Intg | 2001 | 7,637 | Good |
| I-80 Ebl over UPRR / Wyo 76 | 2001 | 7,637 | Good |
| I-80 Wbl over Two Mile Draw | 1963 | 7,404 | Fair |
| I-80 Wbl over Separation Creek | 1961 | 7,133 | Fair |
| I-80 Wbl over Shamrock Road | 1959 | 7,133 | Fair |
| I-80 Wbl over Daley Road Intg | 1961 | 7,123 | Fair |
| I-80 Ebl over Two Mile Draw | 1963 | 6,989 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Wyoming: Wyoming 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.