Bridge conditions in Washington County, Oregon
334 inventoried bridges · 11 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
11 of the 334 bridges the federal inventory lists in Washington County are rated poor; the rest split 96 good and 227 fair.
- 11 of the 334 bridges in Washington County, Oregon, are rated in poor condition (3.3%) in the 2025 National Bridge Inventory, as of .
- 96 bridges (28.7%) are rated good and 227 (68.0%) fair.
- The median Washington County bridge was built in 1982.
- The busiest poor-rated bridge is SW 205TH Ave over Beaverton Creek (built 1960), carrying about 14,741 vehicles a day.
Good 28.7% · Fair 68.0% · Poor 3.3% of 334 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 |
|---|---|---|---|
| SW 205TH Ave over Beaverton Creek | 1960 | 14,741 | Poor |
| Hwy 29 over PNWR & Scoggin Creek | 1967 | 12,233 | Poor |
| US 26 (hwy 047) over West Fork Dairy Creek | 1940 | 9,574 | Poor |
| Hwy 140 over Jackson Bottom Slough | 1966 | 8,728 | Poor |
| North Dakota St over Fanno Creek | 1962 | 6,925 | Poor |
| Tigard Street over Fanno Creek | 1958 | 5,667 | Poor |
| Uebel Road over E Fork Dairy Creek | 1973 | 1,202 | Poor |
| Bohmann Parkway over Fanno Creek | 1957 | 282 | Poor |
| Rein Road over Cedar Creek | 1978 | 214 | Poor |
| Turk Road over West Fork Dairy Creek | 1961 | 208 | Poor |
| Lake Access over Wapato Creek | 1950 | 1 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-5 (hwy 001) over Lower Boonesferry | 1975 | 156,558 | Fair |
| I-5 (hwy 001) over Tualatin River | 1975 | 156,016 | Fair |
| I-5 (hwy 001) over P&w RR | 1975 | 154,838 | Fair |
| US 26 (hwy 047) EB over Cedar Hills Blvd | 1966 | 144,211 | Fair |
| US 26 (hwy 047) over Hwy 144 | 1986 | 133,089 | Fair |
| US 26 (Hwy 047) over Light Rail Transit | 1996 | 133,089 | Fair |
| US 26 (Hwy 047) over Hwy 29 Canyon Road | 2004 | 122,443 | Good |
| Or 217 (hwy 144) over Pnwr | 1968 | 111,230 | Fair |
| Or 217 (hwy 144) over Hwy 29 Tv Hwy | 1971 | 111,230 | Fair |
| Or 217 (hwy 144) over Hwy 40 Ore 10 | 1971 | 111,230 | 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.