Dunlap Road over Slough
GoodGrays Harbor County, Washington · 00.9 S JCT SR12 · Structure no. 082180000000000
- Built
- 1985
- 40 years old
- Condition
- Good
- inspected January 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 63 ft
- 3 main spans
- Daily traffic
- 29
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Dunlap Road over Slough is a prestressed concrete slab carrying Dunlap Road over Slough in Grays Harbor County, Washington. It was built in 1985, so it is 40 years old, younger 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 29 vehicles a day, roughly 30% of them trucks, projected to reach 35 by 2043. The structure is 63 ft (19.1 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 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 Dunlap Road over Slough built?
It was built in 1985, making it 40 years old in 2025.
What condition is Dunlap Road over Slough 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 January 2024.
How much traffic does Dunlap Road over Slough carry?
About 29 vehicles per day (2023 count), of which roughly 30% are trucks.
How long is Dunlap Road over Slough?
The structure is 63 ft (19.1 m) long with a longest span of 25 ft (7.6 m) and a deck 20 ft wide.
Who owns Dunlap Road over Slough?
It is owned by the County Highway Agency.