US Bridges

Marine Drive over Sturgeon Creek

Fair

Snohomish County, Washington · 0.8 NW JCT I-5 · Structure no. 085653000000000

Built
1988
37 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
432 ft
2 main spans
Daily traffic
16,436
2021 count
Owner
County
County Highway Agency

About this bridge

Marine Drive over Sturgeon Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Marine Drive over Sturgeon Creek in Snohomish County, Washington. It was built in 1988, so it is 37 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 16,436 vehicles a day, roughly 11% of them trucks, projected to reach 20,000 by 2046. The structure is 432 ft (131.7 m) long and 62 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

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CarriesMarine Drive
CrossesSturgeon Creek
Location0.8 NW JCT I-5
RouteCounty Highway 96829
CountySnohomish County
StateWashington
Coordinates48.05567, -122.19616
Functional classUrban Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+4 approach)
Design loadHS 20
Structure length432 ft (131.7 m)
Longest span130 ft (39.6 m)
Deck width62 ft (19 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,436 (2021)
Projected traffic20,000 by 2046
Trucks11%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed24.2 mi (39 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$21 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Marine Drive over Sturgeon Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Marine Drive over Sturgeon 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 August 2024.

How much traffic does Marine Drive over Sturgeon Creek carry?

About 16,436 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Marine Drive over Sturgeon Creek?

The structure is 432 ft (131.7 m) long with a longest span of 130 ft (39.6 m) and a deck 62 ft wide.

Who owns Marine Drive over Sturgeon Creek?

It is owned by the County Highway Agency.