Bridge conditions in Tillamook County, Oregon
228 inventoried bridges · 15 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Tillamook County tracks close to typical: 15 of its 228 inventoried bridges (6.6%) are rated poor, against a national rate of about 7%.
- 15 of the 228 bridges in Tillamook County, Oregon, are rated in poor condition (6.6%) in the 2025 National Bridge Inventory, as of .
- 68 bridges (29.8%) are rated good and 145 (63.6%) fair.
- The median Tillamook County bridge was built in 1979.
- The busiest poor-rated bridge is US101 (hwy 9) over Kilchis R. & Possetti Rd (built 1952), carrying about 13,357 vehicles a day.
Good 29.8% · Fair 63.6% · Poor 6.6% of 228 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 |
|---|---|---|---|
| US101 (hwy 9) over Kilchis R. & Possetti Rd | 1952 | 13,357 | Poor |
| Hwy 131 over Trask River | 1948 | 5,192 | Poor |
| OR 6 (Hwy 37) over Wilson River | 1939 | 5,092 | Poor |
| Hwy 131 over Tillamook River | 1962 | 4,701 | Poor |
| OR 22 (Hwy 32) over Louie Creek | 1962 | 1,724 | Poor |
| Hwy 130 over Panther Creek | 1957 | 717 | Poor |
| Hwy 130 over Little Nestucca River | 1952 | 576 | Poor |
| Hwy 130 over Little Nestucca River | 1934 | 576 | Poor |
| New Miami River Rd over Miami Rv | 1978 | 106 | Poor |
| Foss Road over Cronin Creek | 1984 | 92 | Poor |
| Learned Road over Slough | 1964 | 74 | Poor |
| Ridge View Way over Foley Creek | 1972 | 69 | Poor |
| Goodspeed Road over Hall Slough | 1960 | 67 | Poor |
| Blum Lane over Dougherty Slough | 1989 | 15 | Poor |
| Big Trout Road over Three Rivers | 1994 | 15 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US101 (Hwy 9) over Dougherty Slough | 2000 | 19,578 | Good |
| US101 (Hwy 9) over Hall Slough | 2000 | 19,261 | Good |
| US101 (Hwy 9) over POTB Railroad | 1931 | 13,357 | Fair |
| US101 (hwy 9) over Kilchis R. & Possetti Rd | 1952 | 13,357 | Poor |
| US101 (hwy 9) over Stasek Slough | 1952 | 13,357 | Fair |
| US101 (hwy 9) over Neilson Slough | 1952 | 13,357 | Fair |
| US101 (Hwy 9) over Wilson River Slough | 1931 | 11,881 | Fair |
| US101 (Hwy 9) over Wilson River | 1931 | 11,881 | Fair |
| US101 (hwy 9) over Hathaway Slough | 1952 | 11,836 | Fair |
| US101 (hwy 9) over Cattlepass & Drainage | 1952 | 11,836 | 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.