SR 401 over Naselle R Overflow
GoodPacific County, Washington · 12.0 N JCT US 101 · Structure no. 0007360B0000000
- Built
- 1964
- 61 years old
- Condition
- Good
- inspected August 2022
- Type
- Slab
- Concrete Continuous
- Length
- 101 ft
- 4 main spans
- Daily traffic
- 2,839
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 401 over Naselle R Overflow is a concrete continuous slab carrying SR 401 over Naselle R Overflow in Pacific County, Washington. It was built in 1964, so it is 61 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 2,839 vehicles a day, roughly 10% of them trucks, projected to reach 3,662 by 2039. The structure is 101 ft (30.8 m) long and 42 ft wide. If it were closed, the detour would be 6.8 mi (11 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 401 over Naselle R Overflow built?
It was built in 1964, making it 61 years old in 2025.
What condition is SR 401 over Naselle R Overflow in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2022.
How much traffic does SR 401 over Naselle R Overflow carry?
About 2,839 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is SR 401 over Naselle R Overflow?
The structure is 101 ft (30.8 m) long with a longest span of 28 ft (8.5 m) and a deck 42 ft wide.
Who owns SR 401 over Naselle R Overflow?
It is owned by the State Highway Agency.