Bridge conditions in Idaho County, Idaho
216 inventoried bridges · 15 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 216 bridges in Idaho County: 87 rated good, 114 fair, and 15 poor.
- 15 of the 216 bridges in Idaho County, Idaho, are rated in poor condition (6.9%) in the 2025 National Bridge Inventory, as of .
- 87 bridges (40.3%) are rated good and 114 (52.8%) fair.
- The median Idaho County bridge was built in 1969.
- The busiest poor-rated bridge is SH 13B over M.f.clwater R.;e.kooskia (built 1935), carrying about 980 vehicles a day.
Good 40.3% · Fair 52.8% · Poor 6.9% of 216 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 13B over M.f.clwater R.;e.kooskia | 1935 | 980 | Poor |
| STC4705;DOUMECQ Rd over Salmon R;whitebird Truss | 1935 | 550 | Poor |
| Rock Creek Road over Red Rock Creek | 1970 | 200 | Poor |
| Crooked River Road over Upper Crooked River | 1965 | 110 | Poor |
| Fdr 500 over Eldorado Creek | 1967 | 99 | Poor |
| Forest Road 2038 over Slate Creek | 1953 | 50 | Poor |
| Forest Road 1614 over French Creek | 1957 | 50 | Poor |
| Forest Road 357 over Running CR | 1956 | 50 | Poor |
| Forest Road 421 over Little Mallard Creek | 1984 | 50 | Poor |
| Forest Road 443 over Selway River | 1934 | 50 | Poor |
| Forest Road 651 over Selway River-ohara | 1956 | 50 | Poor |
| Fdr 103 over Yoosa Creek | 1963 | 40 | Poor |
| Fdr 520 over Yoosa Creek | 1963 | 40 | Poor |
| Longhaul Road over Cottonwood Creek | 1960 | 30 | Poor |
| Rd 360 over Savage Creek | 2006 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 95 over Lawyers Canyon Creek | 1991 | 3,500 | Fair |
| US 95 over Little Salmon River | 1975 | 3,100 | Fair |
| SH 13 over M.fk.clearwater River | 1994 | 3,000 | Good |
| US 95 over Cottonwood Creek | 1978 | 3,000 | Fair |
| US 95 over Whitebird Creek | 1975 | 2,800 | Fair |
| US 95 over Little Salmon River | 2017 | 2,600 | Good |
| US 95 over Little Salmon River | 1962 | 2,600 | Fair |
| US 95 over Little Salmon River | 1962 | 2,600 | Fair |
| US 95 over Little Salmon River | 1961 | 2,600 | Fair |
| US 95 over Rapid River | 2005 | 2,600 | 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.