123rd. S.W. over Black River
GoodThurston County, Washington · 0.37M W of Littlerock RD · Structure no. 083428000000000
- Built
- 1986
- 39 years old
- Condition
- Good
- inspected June 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 180 ft
- 3 main spans
- Daily traffic
- 229
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
123rd. S.W. over Black River is a prestressed concrete slab carrying 123rd. S.W. over Black River in Thurston County, Washington. It was built in 1986, so it is 39 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 229 vehicles a day, roughly 15% of them trucks, projected to reach 354 by 2042. The structure is 180 ft (54.9 m) long and 32 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 | 8 Very Good | No problems noted. |
| 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 123rd. S.W. over Black River built?
It was built in 1986, making it 39 years old in 2025.
What condition is 123rd. S.W. over Black River 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 June 2024.
How much traffic does 123rd. S.W. over Black River carry?
About 229 vehicles per day (2020 count), of which roughly 15% are trucks.
How long is 123rd. S.W. over Black River?
The structure is 180 ft (54.9 m) long with a longest span of 60 ft (18.3 m) and a deck 32 ft wide.
Who owns 123rd. S.W. over Black River?
It is owned by the County Highway Agency.