US Bridges

363 Ave SE over Wallace River

Good

Snohomish County, Washington · 0.1 S JCT SR 2 · Structure no. 086033000000000

Built
1993
32 years old
Condition
Good
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
227 ft
1 main span
Daily traffic
302
2021 count
Owner
County
County Highway Agency

About this bridge

363 Ave SE over Wallace River is a prestressed concrete tee beam carrying 363 Ave SE over Wallace River in Snohomish County, Washington. It was built in 1993, so it is 32 years old, younger 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 302 vehicles a day, roughly 26% of them trucks, projected to reach 600 by 2046. The structure is 227 ft (69.1 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Carries363 Ave SE
CrossesWallace River
Location0.1 S JCT SR 2
RouteCounty Highway 53500
Coordinates47.86641, -121.74534
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1 (+2 approach)
Design loadHS 20
Structure length227 ft (69.1 m)
Longest span119 ft (36.2 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic302 (2021)
Projected traffic600 by 2046
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$8.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 363 Ave SE over Wallace River built?

It was built in 1993, making it 32 years old in 2025.

What condition is 363 Ave SE over Wallace River 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 September 2024.

How much traffic does 363 Ave SE over Wallace River carry?

About 302 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is 363 Ave SE over Wallace River?

The structure is 227 ft (69.1 m) long with a longest span of 119 ft (36.2 m) and a deck 31 ft wide.

Who owns 363 Ave SE over Wallace River?

It is owned by the County Highway Agency.