US 101 over Greenhead Slough
PoorPacific County, Washington · 7.0 N JCT SR 103 · Structure no. 0001856A0000000
- Built
- 1934
- 91 years old
- Condition
- Poor
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 534 ft
- 28 main spans
- Daily traffic
- 1,911
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 101 over Greenhead Slough is a wood or timber stringer/multi-beam or girder carrying US 101 over Greenhead Slough in Pacific County, Washington. It was built in 1934, so it is 91 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 3 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 1,911 vehicles a day, roughly 10% of them trucks, projected to reach 2,241 by 2039. The structure is 534 ft (162.8 m) long and 26 ft wide. If it were closed, the detour would be 41 mi (66 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 101 over Greenhead Slough built?
It was built in 1934, making it 91 years old in 2025.
What condition is US 101 over Greenhead Slough 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 April 2024.
How much traffic does US 101 over Greenhead Slough carry?
About 1,911 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is US 101 over Greenhead Slough?
The structure is 534 ft (162.8 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.
Who owns US 101 over Greenhead Slough?
It is owned by the State Highway Agency.