US Bridges

Locust Way over Swamp Creek

PoorPosted for load

Snohomish County, Washington · 1.1 N King CO Line · Structure no. 083504000000000

Built
1960
65 years old, rebuilt 1988
Condition
Poor
inspected October 2024
Type
Channel Beam
Concrete
Length
41 ft
2 main spans
Daily traffic
8,654
2022 count
Owner
County
County Highway Agency

About this bridge

Locust Way over Swamp Creek is a concrete channel beam carrying Locust Way over Swamp Creek in Snohomish County, Washington. It was built in 1960 and reconstructed in 1988, so it is 65 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. Its operating status is: posted for load restriction.

It carries about 8,654 vehicles a day, roughly 6% of them trucks, projected to reach 15,000 by 2046. The structure is 41 ft (12.5 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLocust Way
CrossesSwamp Creek
Location1.1 N King CO Line
RouteCounty Highway 90136
Coordinates47.79234, -122.25598
Functional classUrban Minor Arterial

Condition and inspection

Poor

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.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating23 US tons
Inventory rating17 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans2
Design loadH 15
Structure length41 ft (12.5 m)
Longest span19 ft (5.9 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,654 (2022)
Projected traffic15,000 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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$1.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Locust Way over Swamp Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1988.

What condition is Locust Way over Swamp Creek 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 October 2024.

How much traffic does Locust Way over Swamp Creek carry?

About 8,654 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Locust Way over Swamp Creek?

The structure is 41 ft (12.5 m) long with a longest span of 19 ft (5.9 m) and a deck 24 ft wide.

Who owns Locust Way over Swamp Creek?

It is owned by the County Highway Agency.