SR 401 over Naselle R Overflow
Pacific County, Washington · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 401 over Naselle R Overflow in Pacific County, Washington, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1964, making it 61 years old at the 2025 inventory.
- It carries about 2,839 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 68 of the 120 inventoried bridges in Pacific County rated good (56.7%); 9 (7.5%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (46.37361, -123.80361)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 101 ft |
| Location | 12.0 N Jct US 101 |
| NBI structure number | 0007360B0000000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Washington department of transportation.
Busiest bridges in Pacific County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 101 over Columbia R | 1966 | 23,300 | Poor |
| US 101 over Columbia R | 1966 | 22,526 | Fair |
| US 101 over S Fk Willapa River | 1966 | 10,253 | Poor |
| US 101 over N Fk Willapa | 1992 | 8,151 | Fair |
| US 101 over Skidmore Slough | 1980 | 8,012 | Good |
| US 101 over Chinook R | 1927 | 7,256 | Fair |
All bridges nearby: Pacific County, WA bridge conditions · every bridge in Pacific County · Washington bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.