Louisiana ST over Lake Sacajawea
GoodCowlitz County, Washington · Louisiana St. & Lake Sac. · Structure no. 085506000000000
- Built
- 1967
- 58 years old
- Condition
- Good
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 80 ft
- 1 main span
- Daily traffic
- 8,100
- 2021 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Louisiana ST over Lake Sacajawea is a prestressed concrete stringer/multi-beam or girder carrying Louisiana ST over Lake Sacajawea in Cowlitz County, Washington. It was built in 1967, so it is 58 years old, older 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 8,100 vehicles a day, roughly 5% of them trucks, projected to reach 10,900 by 2041. The structure is 80 ft (24.4 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Louisiana ST over Lake Sacajawea built?
It was built in 1967, making it 58 years old in 2025.
What condition is Louisiana ST over Lake Sacajawea 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 Louisiana ST over Lake Sacajawea carry?
About 8,100 vehicles per day (2021 count), of which roughly 5% are trucks.
How long is Louisiana ST over Lake Sacajawea?
The structure is 80 ft (24.4 m) long with a longest span of 80 ft (24.4 m) and a deck 48 ft wide.
Who owns Louisiana ST over Lake Sacajawea?
It is owned by the City or Municipal Highway Agency.