Bridge conditions in Owyhee County, Idaho
49 inventoried bridges · 4 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
4 of the 49 bridges the federal inventory lists in Owyhee County are rated poor; the rest split 16 good and 29 fair.
- 4 of the 49 bridges in Owyhee County, Idaho, are rated in poor condition (8.2%) in the 2025 National Bridge Inventory, as of .
- 16 bridges (32.7%) are rated good and 29 (59.2%) fair.
- The median Owyhee County bridge was built in 1979.
- The busiest poor-rated bridge is Sage Road over Succor Creek (built 1930), carrying about 90 vehicles a day.
Good 32.7% · Fair 59.2% · Poor 8.2% of 49 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 |
|---|---|---|---|
| Sage Road over Succor Creek | 1930 | 90 | Poor |
| River Road over Vinson Wash | 1930 | 60 | Poor |
| Sheep Camp Rd over Grandview Irrigation Cnl | 1991 | 60 | Poor |
| Salmon Creek Rd over Reynolds Creek | 1960 | 20 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 95 over Snake River;homedale Br. | 1969 | 11,000 | Fair |
| SH 55 over Snake River (marsing Br) | 2020 | 7,500 | Fair |
| US 95 over B Line Canal | 1982 | 3,600 | Good |
| US 95 over Jump Creek | 1982 | 3,200 | Good |
| SH 19 over Succor Creek | 2017 | 2,500 | Good |
| SH 45 over Snake R.(walters Ferry) | 1972 | 1,900 | Fair |
| SH 167 over Grandview Irrig.dist.cnl | 1970 | 1,800 | Fair |
| SH 78 over Snake R.;indian Cove Br. | 1967 | 1,600 | Fair |
| SH 167 over Snake River;grandview Br | 1970 | 1,600 | Fair |
| SH 51 over West Bruneau Rvr Slough | 1955 | 1,500 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Idaho: Idaho 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.