Interlaaken DR SW over Steilacoom Lake
PoorPosted for loadPierce County, Washington · 1.0 E JCT Grvly Lk · Structure no. 079998000000000
- Built
- 1927
- 98 years old, rebuilt 1951
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 682 ft
- 43 main spans
- Daily traffic
- 4,905
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Interlaaken DR SW over Steilacoom Lake is a wood or timber stringer/multi-beam or girder carrying Interlaaken DR SW over Steilacoom Lake in Pierce County, Washington. It was built in 1927 and reconstructed in 1951, so it is 98 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 4,905 vehicles a day, roughly 3% of them trucks, projected to reach 3,400 by 2041. The structure is 682 ft (207.9 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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 Interlaaken DR SW over Steilacoom Lake built?
It was built in 1927, making it 98 years old in 2025. It was reconstructed in 1951.
What condition is Interlaaken DR SW over Steilacoom Lake in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.
How much traffic does Interlaaken DR SW over Steilacoom Lake carry?
About 4,905 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Interlaaken DR SW over Steilacoom Lake?
The structure is 682 ft (207.9 m) long with a longest span of 29 ft (8.8 m) and a deck 24 ft wide.
Who owns Interlaaken DR SW over Steilacoom Lake?
It is owned by the City or Municipal Highway Agency.