US Bridges

Locust Way over Swamp Creek

Fair

Snohomish County, Washington · 1.9 N King CO Line · Structure no. 086034000000000

Built
1993
32 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
3,514
2020 count
Owner
County
County Highway Agency

About this bridge

Locust Way over Swamp Creek is a prestressed concrete stringer/multi-beam or girder carrying Locust Way over Swamp Creek 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,514 vehicles a day, roughly 6% of them trucks, projected to reach 6,000 by 2046. The structure is 55 ft (16.7 m) long and 42 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLocust Way
CrossesSwamp Creek
Location1.9 N King CO Line
RouteCounty Highway 90136
Coordinates47.79881, -122.25473
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length55 ft (16.7 m)
Longest span50 ft (15.2 m)
Deck width42 ft (12.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,514 (2020)
Projected traffic6,000 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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$2.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Locust Way over Swamp Creek built?

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

What condition is Locust Way over Swamp Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does Locust Way over Swamp Creek carry?

About 3,514 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Locust Way over Swamp Creek?

The structure is 55 ft (16.7 m) long with a longest span of 50 ft (15.2 m) and a deck 42 ft wide.

Who owns Locust Way over Swamp Creek?

It is owned by the County Highway Agency.