Bridge conditions in Okanogan County, Washington
161 inventoried bridges · 12 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
12 of the 161 bridges the federal inventory lists in Okanogan County are rated poor; the rest split 75 good and 74 fair.
- 12 of the 161 bridges in Okanogan County, Washington, are rated in poor condition (7.5%) in the 2025 National Bridge Inventory, as of .
- 75 bridges (46.6%) are rated good and 74 (46.0%) fair.
- The median Okanogan County bridge was built in 1967.
- The busiest poor-rated bridge is US 97 over SR 155 (built 1964), carrying about 8,828 vehicles a day.
Good 46.6% · Fair 46.0% · Poor 7.5% of 161 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 |
|---|---|---|---|
| US 97 over SR 155 | 1964 | 8,828 | Poor |
| US 97 over Watson Draw | 1965 | 5,644 | Poor |
| SR 20 over Methow River | 1929 | 4,683 | Poor |
| SR 20 over Chewuch River | 1961 | 3,696 | Poor |
| SR 153 over Methow River | 1939 | 1,847 | Poor |
| SR 153 over Methow River | 1939 | 1,847 | Poor |
| SR 153 over Methow River | 1939 | 1,847 | Poor |
| SR 153 over Methow River | 1939 | 1,847 | Poor |
| SR 20 over Early Winters Creek | 1964 | 1,280 | Poor |
| Fas Route A240 over Twisp River | 1949 | 770 | Poor |
| Lost River Rd over Lost River | 1950 | 95 | Poor |
| County Road 1600 over Beaver Creek | 1957 | 43 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 97 over Okanogan River | 1964 | 8,828 | Fair |
| US 97 over SR 155 | 1964 | 8,828 | Poor |
| US 97 over Gn Rr-county Road | 1964 | 7,453 | Good |
| SR 155 Spur over Okanogan River | 1923 | 5,987 | Fair |
| US 97 over Bonaparte CR | 1957 | 5,771 | Good |
| US 97 over Watson Draw | 1965 | 5,644 | Poor |
| US 97 over Methow River | 1966 | 5,564 | Fair |
| SR 215 over Salmon CR | 1950 | 5,294 | Fair |
| SR 20 over H W Channel Methow R | 1945 | 4,775 | Good |
| SR 20 over H W Channel Methow R | 1946 | 4,775 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Washington: Washington 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.