Jackson HWY over Newaukum Overflow
FairLewis County, Washington · 2.56 N JCT SR 508 · Structure no. 081614000000000
- Built
- 1926
- 99 years old, rebuilt 1978
- Condition
- Fair
- inspected February 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 82 ft
- 3 main spans
- Daily traffic
- 3,427
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
Jackson HWY over Newaukum Overflow is a concrete continuous tee beam carrying Jackson HWY over Newaukum Overflow in Lewis County, Washington. It was built in 1926 and reconstructed in 1978, so it is 99 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 5 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 3,427 vehicles a day, roughly 13% of them trucks, projected to reach 6,376 by 2040. The structure is 82 ft (25 m) long and 39 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Jackson HWY over Newaukum Overflow built?
It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1978.
What condition is Jackson HWY over Newaukum Overflow 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 February 2023.
How much traffic does Jackson HWY over Newaukum Overflow carry?
About 3,427 vehicles per day (2019 count), of which roughly 13% are trucks.
How long is Jackson HWY over Newaukum Overflow?
The structure is 82 ft (25 m) long with a longest span of 27 ft (8.2 m) and a deck 39 ft wide.
Who owns Jackson HWY over Newaukum Overflow?
It is owned by the County Highway Agency.