Bridge conditions in Clark County, Idaho
39 inventoried bridges · 5 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 8 bridges in Clark County is rated in poor condition: 5 of 39 on the federal inventory, one of the higher shares in Idaho.
- 5 of the 39 bridges in Clark County, Idaho, are rated in poor condition (12.8%) in the 2025 National Bridge Inventory, as of .
- 9 bridges (23.1%) are rated good and 25 (64.1%) fair.
- The median Clark County bridge was built in 1970.
- The busiest poor-rated bridge is I 15 Sbl over Co.rd.;stoddard Creek Ic (built 1969), carrying about 1,750 vehicles a day.
Good 23.1% · Fair 64.1% · Poor 12.8% of 39 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 |
|---|---|---|---|
| I 15 Sbl over Co.rd.;stoddard Creek Ic | 1969 | 1,750 | Poor |
| Stc 6760;RED Road over Camas Creek | 1953 | 200 | Poor |
| Old Hwy 91 over Uprr;n.spencer RR Op | 1936 | 50 | Poor |
| Diversion Road over Camas Creek | 1953 | 50 | Poor |
| Vadnais Lane over Camas Creek | 1981 | 50 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 15 over Frontage Road | 1965 | 3,700 | Fair |
| I 15 over Beaver Creek | 1969 | 3,500 | Fair |
| I 15 over Frontage Road Gs | 1969 | 3,500 | Fair |
| I 15 over Beaver Creek | 1963 | 3,400 | Fair |
| I 15 Nbl & Sbl over Beaver Creek;s.dubois Br | 1965 | 3,400 | Fair |
| I 15 Nbl over Spencer Road Ic | 1969 | 1,850 | Fair |
| I 15 Sbl over Spencer Road Ic | 1969 | 1,850 | Fair |
| SH 22 over I 15 Nb-sb; Dubois Ic | 2012 | 1,800 | Good |
| I 15 Nbl over Co.rd.;stoddard Creek Ic | 1969 | 1,750 | Fair |
| I 15 Sbl over Co.rd.;stoddard Creek Ic | 1969 | 1,750 | Poor |
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.