Bridge conditions in Coos County, Oregon
255 inventoried bridges · 8 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
8 of the 255 bridges the federal inventory lists in Coos County are rated poor; the rest split 87 good and 160 fair.
- 8 of the 255 bridges in Coos County, Oregon, are rated in poor condition (3.1%) in the 2025 National Bridge Inventory, as of .
- 87 bridges (34.1%) are rated good and 160 (62.7%) fair.
- The median Coos County bridge was built in 1977.
- The busiest poor-rated bridge is County Rd 7A over Haynes Slough (built 1971), carrying about 1,733 vehicles a day.
Good 34.1% · Fair 62.7% · Poor 3.1% of 255 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 |
|---|---|---|---|
| County Rd 7A over Haynes Slough | 1971 | 1,733 | Poor |
| Fillmore Ave over Ferry Creek | 1960 | 1,200 | Poor |
| County Rd 10A over Graydon-anderson/slough | 2000 | 642 | Poor |
| County Rd 118G over Noble Creek | 1970 | 91 | Poor |
| County Rd 153G over South Fork Coquille R. | 1979 | 84 | Poor |
| Elk Creek Road over S Fk Coquille River | 1950 | 50 | Poor |
| County Rd 68 over South Slough | 1977 | 27 | Poor |
| Hwy. 2300 over W. Fk. Millicoma River | 1984 | 25 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US101(HWY009) over Coalbank Slough | 1987 | 31,461 | Fair |
| US101(HWY009) over Coos Bay (mccullough Br) | 1936 | 19,023 | Fair |
| US101(HWY009) over Cbrl | 1935 | 19,023 | Fair |
| Hwy 240 over Pony Creek | 1983 | 18,158 | Fair |
| US101(HWY009) over Coos Bay (mccullough Br) | 1936 | 17,390 | Fair |
| US101(HWY009) over Coos Bay (mccullough Br) | 1936 | 17,390 | Fair |
| US101(HWY009) over Haynes Inlet Slough | 2001 | 17,340 | Fair |
| US101(HWY009) over Ferry Creek | 1962 | 12,555 | Fair |
| Private Access over Ferry Creek | 1999 | 12,555 | Good |
| US101(HWY009) over North Slough | 1953 | 12,441 | 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.