Steilacoom Dupont over I-5
PoorPierce County, Washington · 4.1 N Thurston CO · Structure no. 0005394A0000000
- Built
- 1957
- 68 years old
- Condition
- Poor
- inspected March 2024
- Type
- Slab
- Concrete Continuous
- Length
- 111 ft
- 2 main spans
- Daily traffic
- 11,876
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
Steilacoom Dupont over I-5 is a concrete continuous slab carrying Steilacoom Dupont over I-5 in Pierce County, Washington. It was built in 1957, so it is 68 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.
It carries about 11,876 vehicles a day, roughly 5% of them trucks, projected to reach 19,287 by 2036. The structure is 111 ft (33.8 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Steilacoom Dupont over I-5 built?
It was built in 1957, making it 68 years old in 2025.
What condition is Steilacoom Dupont over I-5 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 March 2024.
How much traffic does Steilacoom Dupont over I-5 carry?
About 11,876 vehicles per day (2010 count), of which roughly 5% are trucks.
How long is Steilacoom Dupont over I-5?
The structure is 111 ft (33.8 m) long with a longest span of 54 ft (16.5 m) and a deck 37 ft wide.
Who owns Steilacoom Dupont over I-5?
It is owned by the State Highway Agency.