US Bridges

228th ST SW over North Creek

Good

Snohomish County, Washington · 0.5 E Int I405 · Structure no. 086828000000000

Built
1999
26 years old
Condition
Good
inspected September 2024
Type
Slab
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
14,319
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

228th ST SW over North Creek is a prestressed concrete slab carrying 228th ST SW over North Creek in Snohomish County, Washington. It was built in 1999, so it is 26 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 14,319 vehicles a day, roughly 10% of them trucks, projected to reach 27,000 by 2046. The structure is 42 ft (12.9 m) long and 60 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries228th ST SW
CrossesNorth Creek
Location0.5 E Int I405
RouteCity Street 110
Coordinates47.79128, -122.19751
Functional classUrban Minor Arterial

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 within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating48.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length42 ft (12.9 m)
Longest span39 ft (11.9 m)
Deck width60 ft (18.4 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,319 (2024)
Projected traffic27,000 by 2046
Trucks10%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 228th ST SW over North Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is 228th ST SW over North Creek 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 228th ST SW over North Creek carry?

About 14,319 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 228th ST SW over North Creek?

The structure is 42 ft (12.9 m) long with a longest span of 39 ft (11.9 m) and a deck 60 ft wide.

Who owns 228th ST SW over North Creek?

It is owned by the City or Municipal Highway Agency.