Bridge conditions in Ferry County, Washington
55 inventoried bridges · 6 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 55 Ferry County bridges in the federal inventory, 6 carry a poor rating. That 10.9% share is roughly 2x the national average.
- 6 of the 55 bridges in Ferry County, Washington, are rated in poor condition (10.9%) in the 2025 National Bridge Inventory, as of .
- 23 bridges (41.8%) are rated good and 26 (47.3%) fair.
- The median Ferry County bridge was built in 1975.
- The busiest poor-rated bridge is SR 20 over Abandoned Railroad (built 1960), carrying about 2,660 vehicles a day.
Good 41.8% · Fair 47.3% · Poor 10.9% of 55 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 |
|---|---|---|---|
| SR 20 over Abandoned Railroad | 1960 | 2,660 | Poor |
| SR 21 over San Poil R | 1931 | 705 | Poor |
| SR 21 over San Poil River | 1931 | 193 | Poor |
| Irr Bia Rte 1123 over Sitdown Creek | 1993 | 50 | Poor |
| Silver Ck Rd 00670 over Nine Mile Creek | 1958 | 47 | Poor |
| McMANN CREEK ROAD over San Poil River | 1953 | 9 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 20 over Abandoned Railroad | 1960 | 2,660 | Poor |
| SR 21 over San Poil River | 1987 | 1,580 | Good |
| Bridge Creek Road over Cornstalk Creek | 2000 | 1,493 | Good |
| Boulder Creek Road over Curlew Creek | 2000 | 1,390 | Good |
| SR 21 over Curlew Creek | 2012 | 1,146 | Good |
| W Curlew Lake Rd over Curlew Creek | 2024 | 1,074 | Good |
| US 395 over RR | 1941 | 1,051 | Good |
| Inch-ktl Falls over Sherman Creek | 1958 | 867 | Good |
| SR 20 over Obrien Creek | 2002 | 774 | Good |
| SR 21 over Kettle River | 1960 | 770 | Fair |
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.