Bridge conditions in Sweetwater County, Wyoming
191 inventoried bridges · 14 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
14 of the 191 bridges the federal inventory lists in Sweetwater County are rated poor; the rest split 48 good and 129 fair.
- 14 of the 191 bridges in Sweetwater County, Wyoming, are rated in poor condition (7.3%) in the 2025 National Bridge Inventory, as of .
- 48 bridges (25.1%) are rated good and 129 (67.5%) fair.
- The median Sweetwater County bridge was built in 1967.
- The busiest poor-rated bridge is Wyo 530 Sbl over UPRR / I-80 Bus (built 1978), carrying about 9,974 vehicles a day.
Good 25.1% · Fair 67.5% · Poor 7.3% of 191 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 |
|---|---|---|---|
| Wyo 530 Sbl over UPRR / I-80 Bus | 1978 | 9,974 | Poor |
| Wyo 530 Nbl over UPRR / I-80 Bus | 1994 | 9,974 | Poor |
| Wyo 530 Sbl over Green River | 1982 | 9,814 | Poor |
| I-80 Ebl over Sw CR 53 (White Mtn Rd) | 1966 | 7,912 | Poor |
| I-80 Ebl over Wyo 374 | 1967 | 7,357 | Poor |
| I-80 Ebl over Wyo 377 | 1964 | 6,916 | Poor |
| Wyo 376 over UPRR / Bitter Creek | 1981 | 2,601 | Poor |
| Wyo 374 over Grease Wood Draw | 1942 | 2,401 | Poor |
| Sw Cnty Rd 51 over Little Bitter Creek | 1975 | 2,241 | Poor |
| Sw Cnty Rd 51 over Sweetwater Creek | 1975 | 2,241 | Poor |
| N Street over Bitter Creek | 1976 | 928 | Poor |
| Wyo 28 over Green River | 1985 | 572 | Poor |
| Sw Cnty Rd 62 over Red Creek | 1982 | 110 | Poor |
| Sw Cnty Rd 5 over Big Sandy River | 1960 | 9 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Wyo 376 over UPRR | 1977 | 14,871 | Fair |
| Wyo 376 over Bitter Creek | 1977 | 14,871 | Fair |
| I-80 / US 30 Bus over Bitter Creek | 1991 | 14,286 | Fair |
| I-80 Wbl over I-80 Service Road | 1969 | 13,609 | Fair |
| I-80 Wbl over East Green River Intg | 2002 | 13,609 | Fair |
| I-80 EBL and WBL over Alkali Flat | 1964 | 11,730 | Fair |
| I-80 Ebl over I-80 Service Road | 1969 | 11,727 | Fair |
| I-80 Ebl over East Green River Intg | 2002 | 11,727 | Good |
| Wyo 530 Sbl over UPRR / I-80 Bus | 1978 | 9,974 | Poor |
| Wyo 530 Nbl over UPRR / I-80 Bus | 1994 | 9,974 | Poor |
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.