Nisqually Cutoff over Overflow Channel
FairThurston County, Washington · .2 E JCT I5 · Structure no. 080616000000000
- Built
- 1936
- 89 years old
- Condition
- Fair
- inspected September 2023
- Type
- Tee Beam
- Concrete
- Length
- 92 ft
- 3 main spans
- Daily traffic
- 5,226
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Nisqually Cutoff over Overflow Channel is a concrete tee beam carrying Nisqually Cutoff over Overflow Channel in Thurston County, Washington. It was built in 1936, so it is 89 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 5,226 vehicles a day, roughly 25% of them trucks, projected to reach 8,079 by 2042. The structure is 92 ft (28 m) long and 51 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nisqually Cutoff over Overflow Channel built?
It was built in 1936, making it 89 years old in 2025.
What condition is Nisqually Cutoff over Overflow Channel 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 September 2023.
How much traffic does Nisqually Cutoff over Overflow Channel carry?
About 5,226 vehicles per day (2020 count), of which roughly 25% are trucks.
How long is Nisqually Cutoff over Overflow Channel?
The structure is 92 ft (28 m) long with a longest span of 30 ft (9.1 m) and a deck 51 ft wide.
Who owns Nisqually Cutoff over Overflow Channel?
It is owned by the County Highway Agency.