Bridge conditions in Valley County, Idaho
153 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 153 bridges in Valley County: 72 rated good, 71 fair, and 10 poor.
- 10 of the 153 bridges in Valley County, Idaho, are rated in poor condition (6.5%) in the 2025 National Bridge Inventory, as of .
- 72 bridges (47.1%) are rated good and 71 (46.4%) fair.
- The median Valley County bridge was built in 1978.
- The busiest poor-rated bridge is SH 55 over Uprr;n.fk.payette River (built 1933), carrying about 4,100 vehicles a day.
Good 47.1% · Fair 46.4% · Poor 6.5% of 153 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 |
|---|---|---|---|
| SH 55 over Uprr;n.fk.payette River | 1933 | 4,100 | Poor |
| S3944;FARM to Mrkt over Willow Creek | 1996 | 490 | Poor |
| Stc 3988;ROSEBERRY over Willow Creek | 1996 | 370 | Poor |
| Paddy Flat Road over Boulder Creek | 1978 | 230 | Poor |
| Smith Ferry Drive over N.fk.payette River | 1959 | 90 | Poor |
| Nisula Road over Mud Creek | 1986 | 50 | Poor |
| Road 50343 over Logan Creek | 1980 | 50 | Poor |
| East Fork Road over S.fk.salmon River | 1940 | 40 | Poor |
| Burnt Log Road over Johnson Creek | 1977 | 30 | Poor |
| Elk Summit Rd over South Fork Salmon River | 1934 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 55 over N. Fk. Payette River | 2013 | 7,800 | Fair |
| SH 55 over N.fk.payette R;lardo | 2014 | 7,400 | Fair |
| SH 55 over Lake Fork Creek | 1985 | 6,500 | Fair |
| SH 55 over Boulder Creek | 1999 | 6,000 | Fair |
| SH 55 over Lake Fork Creek Canal | 1998 | 6,000 | Fair |
| SH 55 over N. Fk. Payette River | 2015 | 5,700 | Good |
| SH 55 over Gold Fork River | 2016 | 5,200 | Fair |
| SH 55 over Uprr;n.fk.payette River | 1933 | 4,100 | Poor |
| SH 55 over Round Valley Creek | 1933 | 4,100 | Fair |
| SH 55 over Clear Creek | 1933 | 4,100 | 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.