IRR BIA RTE 18 over Boulder Creek
GoodGrays Harbor County, Washington · 4 KM S of Amanda Park JCT · Structure no. 00000000000P012
- Built
- 1980
- 45 years old
- Condition
- Good
- inspected August 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 75 ft
- 1 main span
- Daily traffic
- 50
- 2021 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 18 over Boulder Creek is a prestressed concrete box beam or girders - multiple carrying IRR BIA RTE 18 over Boulder Creek in Grays Harbor County, Washington. It was built in 1980, so it is 45 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 50 vehicles a day, roughly 20% of them trucks, projected to reach 68 by 2040. The structure is 75 ft (22.9 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR BIA RTE 18 over Boulder Creek built?
It was built in 1980, making it 45 years old in 2025.
What condition is IRR BIA RTE 18 over Boulder Creek 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 2024.
How much traffic does IRR BIA RTE 18 over Boulder Creek carry?
About 50 vehicles per day (2021 count), of which roughly 20% are trucks.
How long is IRR BIA RTE 18 over Boulder Creek?
The structure is 75 ft (22.9 m) long with a longest span of 72 ft (21.9 m) and a deck 27 ft wide.
Who owns IRR BIA RTE 18 over Boulder Creek?
It is owned by the Bureau of Indian Affairs.