Bridge conditions in Grant County, Oregon
145 inventoried bridges · 6 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 145 bridges in Grant County: 69 rated good, 70 fair, and 6 poor.
- 6 of the 145 bridges in Grant County, Oregon, are rated in poor condition (4.1%) in the 2025 National Bridge Inventory, as of .
- 69 bridges (47.6%) are rated good and 70 (48.3%) fair.
- The median Grant County bridge was built in 1979.
- The busiest poor-rated bridge is Nugget Street over Canyon Creek (built 1972), carrying about 111 vehicles a day.
Good 47.6% · Fair 48.3% · Poor 4.1% of 145 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 |
|---|---|---|---|
| Nugget Street over Canyon Creek | 1972 | 111 | Poor |
| 4550000 Road over Badger Creek | 1998 | 100 | Poor |
| Nfsr over Bear Creek - Crab | 1971 | 80 | Poor |
| C57-morgan Rd over John Day R(morgan Br) | 1976 | 31 | Poor |
| County Rd 18 over Long Creek | 1974 | 21 | Poor |
| 2635000 over John Day River | 1963 | 20 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 26 (hwy 005) over Canyon Creek (john Day) | 2002 | 6,551 | Good |
| US 26 (hwy 005) over John Day River (coles) | 2010 | 2,849 | Good |
| US 26 (hwy 005) over Beech Cr(mt Vernon) | 1956 | 2,836 | Fair |
| US 26 (hwy 005) over Dixie Crk (prairie City) | 1939 | 2,104 | Fair |
| US 26 (hwy 005) over Indian Creek | 1939 | 1,893 | Fair |
| US 26 (hwy 005) over John Day R(prairie City) | 1939 | 1,893 | Fair |
| US 26 (hwy 005) over John Day R(mt Vernon) | 1967 | 1,377 | Good |
| US 26 (hwy 005) over Riley Creek | 1965 | 1,377 | Fair |
| US 26 (hwy 005) over Mcclellan Creek | 1979 | 1,377 | Fair |
| US 26 (hwy 005) over Moon Creek | 1953 | 1,191 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Oregon: Oregon 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.