Bridge conditions in Jefferson County, Oregon
80 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
7 of the 80 bridges the federal inventory lists in Jefferson County are rated poor; the rest split 37 good and 36 fair.
- 7 of the 80 bridges in Jefferson County, Oregon, are rated in poor condition (8.8%) in the 2025 National Bridge Inventory, as of .
- 37 bridges (46.2%) are rated good and 36 (45.0%) fair.
- The median Jefferson County bridge was built in 1983.
- The busiest poor-rated bridge is Bear Dr over Irrigation Canal (built 1952), carrying about 260 vehicles a day.
Good 46.2% · Fair 45.0% · Poor 8.8% of 80 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 |
|---|---|---|---|
| Bear Dr over Irrigation Canal | 1952 | 260 | Poor |
| Camp Sherman Road over Lake Creek | 1969 | 254 | Poor |
| Eureka Lane over Irrigation Canal | 1952 | 235 | Poor |
| Norris Lane over Irrigation Canal | 1950 | 44 | Poor |
| Access Road over Jack Creek | 1946 | 40 | Poor |
| Usfs #14 over Metolius River | 1961 | 20 | Poor |
| Opal Lane over Irrigation Canal | 1952 | 14 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 97 (hwy 004) over Crooked R Canyon High Br | 2000 | 17,957 | Good |
| US 97 (hwy 004) over Ochoco Main Canal N Unit | 2005 | 13,479 | Good |
| US 97 (hwy 004) over Ochoco Main Canal N Unit | 2005 | 12,575 | Good |
| US 97 (hwy 004)NB over Willow Creek | 2006 | 11,568 | Good |
| US 26 (Hwy 053) over BNSF | 2005 | 11,556 | Good |
| US 97 (hwy 004)SB over Willow Creek | 1966 | 10,393 | Fair |
| US 26 (hwy 053) over N Unit Canal | 1948 | 9,652 | Fair |
| US 26 (hwy 053) over Deschutes River | 1934 | 7,631 | Fair |
| US 26 (hwy 053) over Shitike Creek | 1966 | 7,631 | Fair |
| US 20 (hwy 016) over Lake Creek | 2005 | 5,801 | 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.