Tualco Loop RD over Riley Slough
PoorSnohomish County, Washington · 1.0 NW JCT SR 203 · Structure no. 081529000000000
- Built
- 1970
- 55 years old, rebuilt 1989
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 76 ft
- 4 main spans
- Daily traffic
- 200
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Tualco Loop RD over Riley Slough is a wood or timber stringer/multi-beam or girder carrying Tualco Loop RD over Riley Slough in Snohomish County, Washington. It was built in 1970 and reconstructed in 1989, so it is 55 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 200 vehicles a day, roughly 21% of them trucks, projected to reach 250 by 2044. The structure is 76 ft (23.2 m) long and 19 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Tualco Loop RD over Riley Slough built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1989.
What condition is Tualco Loop RD over Riley Slough 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 Tualco Loop RD over Riley Slough carry?
About 200 vehicles per day (2020 count), of which roughly 21% are trucks.
How long is Tualco Loop RD over Riley Slough?
The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.9 m) and a deck 19 ft wide.
Who owns Tualco Loop RD over Riley Slough?
It is owned by the County Highway Agency.