SR 401 over Naselle River Overflow
PoorPacific County, Washington · 11.6 N JCT US 101 · Structure no. 0007360A0000000
- Built
- 1964
- 61 years old
- Condition
- Poor
- inspected August 2024
- Type
- Slab
- Concrete Continuous
- Length
- 200 ft
- 8 main spans
- Daily traffic
- 2,839
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 401 over Naselle River Overflow is a concrete continuous slab carrying SR 401 over Naselle River 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 2,839 vehicles a day, roughly 10% of them trucks, projected to reach 3,662 by 2039. The structure is 200 ft (61 m) long and 36 ft wide. If it were closed, the detour would be 6.8 mi (11 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 River Overflow built?
It was built in 1964, making it 61 years old in 2025.
What condition is SR 401 over Naselle River Overflow in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.
How much traffic does SR 401 over Naselle River Overflow carry?
About 2,839 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is SR 401 over Naselle River Overflow?
The structure is 200 ft (61 m) long with a longest span of 28 ft (8.5 m) and a deck 36 ft wide.
Who owns SR 401 over Naselle River Overflow?
It is owned by the State Highway Agency.