Bridge conditions in Big Horn County, Wyoming
91 inventoried bridges · 9 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Big Horn County tracks close to typical: 9 of its 91 inventoried bridges (9.9%) are rated poor, against a national rate of about 7%.
- 9 of the 91 bridges in Big Horn County, Wyoming, are rated in poor condition (9.9%) in the 2025 National Bridge Inventory, as of .
- 25 bridges (27.5%) are rated good and 57 (62.6%) fair.
- The median Big Horn County bridge was built in 1971.
- The busiest poor-rated bridge is US 14A over Sand Draw (built 1975), carrying about 1,578 vehicles a day.
Good 27.5% · Fair 62.6% · Poor 9.9% of 91 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 |
|---|---|---|---|
| US 14A over Sand Draw | 1975 | 1,578 | Poor |
| Wyo 31 over Nowood River | 1951 | 688 | Poor |
| Bh Cnty Rd 229 over Elk Creek | 1940 | 343 | Poor |
| Bh Cnty Rd 268 over Medicine Lodge Creek | 1970 | 189 | Poor |
| Bh Cnty Rd 72 over Shoshone River | 1926 | 119 | Poor |
| Bh Cnty Rd L55 over Big Horn River | 1930 | 88 | Poor |
| Bh Cnty Rd L32H over Red Gulch | 1950 | 83 | Poor |
| Bh Cnty Rd 196 over Unnamed Draw | 1983 | 52 | Poor |
| Bh Cnty Rd L31 over Shell Creek | 1950 | 31 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 14 over Dry Creek | 1961 | 5,103 | Good |
| US 14 over BNSF Railway | 1961 | 5,103 | Fair |
| US 310 over Shoshone River | 1965 | 4,224 | Fair |
| US 16 over Greybull River | 1955 | 3,036 | Fair |
| US 16 over BNSF Railway | 2005 | 3,036 | Fair |
| US 310 over Little Dry Creek | 1957 | 2,271 | Fair |
| US 310 over Sage Creek | 2019 | 2,247 | Good |
| US 310 over BNSF Railway | 2019 | 2,247 | Good |
| US 14 over Big Horn River | 1987 | 2,151 | Fair |
| US 16 over Big Horn Canal | 1957 | 2,139 | 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.