128th Ave SW over Black River
FairThurston County, Washington · .23 W of Littlerock RD · Structure no. 079925000000000
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected June 2024
- Type
- Slab
- Concrete Continuous
- Length
- 100 ft
- 3 main spans
- Daily traffic
- 3,047
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
128th Ave SW over Black River is a concrete continuous slab carrying 128th Ave SW over Black River in Thurston County, Washington. It was built in 1968, so it is 57 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 3,047 vehicles a day, roughly 15% of them trucks, projected to reach 4,710 by 2041. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 14.3 mi (23 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 128th Ave SW over Black River built?
It was built in 1968, making it 57 years old in 2025.
What condition is 128th Ave SW over Black River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.
How much traffic does 128th Ave SW over Black River carry?
About 3,047 vehicles per day (2021 count), of which roughly 15% are trucks.
How long is 128th Ave SW over Black River?
The structure is 100 ft (30.5 m) long with a longest span of 36 ft (11 m) and a deck 30 ft wide.
Who owns 128th Ave SW over Black River?
It is owned by the County Highway Agency.