SR 18 over Cedar River SE Bain RD
GoodKing County, Washington · 5.2 N JCT SR 516 · Structure no. 0016611A0000000
- Built
- 2005
- 20 years old
- Condition
- Good
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 351 ft
- 3 main spans
- Daily traffic
- 16,971
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 18 over Cedar River SE Bain RD is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 18 over Cedar River SE Bain RD in King County, Washington. It was built in 2005, so it is 20 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 16,971 vehicles a day, roughly 14% of them trucks, projected to reach 24,962 by 2039. The structure is 351 ft (107 m) long and 43 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 18 over Cedar River SE Bain RD built?
It was built in 2005, making it 20 years old in 2025.
What condition is SR 18 over Cedar River SE Bain RD 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 February 2023.
How much traffic does SR 18 over Cedar River SE Bain RD carry?
About 16,971 vehicles per day (2023 count), of which roughly 14% are trucks.
How long is SR 18 over Cedar River SE Bain RD?
The structure is 351 ft (107 m) long with a longest span of 131 ft (39.9 m) and a deck 43 ft wide.
Who owns SR 18 over Cedar River SE Bain RD?
It is owned by the State Highway Agency.