US Bridges

Marine Drive over Jorgenson Slough

Fair

Snohomish County, Washington · 0.8 S SR 532 · Structure no. 084144000000000

Built
1967
58 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
6,375
2022 count
Owner
County
County Highway Agency

About this bridge

Marine Drive over Jorgenson Slough is a prestressed concrete tee beam carrying Marine Drive over Jorgenson Slough in Snohomish County, Washington. It was built in 1967, so it is 58 years old, older 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 5 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 6,375 vehicles a day, roughly 13% of them trucks, projected to reach 10,000 by 2045. The structure is 61 ft (18.6 m) long and 29 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesMarine Drive
CrossesJorgenson Slough
Location0.8 S SR 532
RouteCounty Highway 96833
CountySnohomish County
StateWashington
Coordinates48.23113, -122.34651
Functional classRural 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating37 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span59 ft (18 m)
Deck width29 ft (8.7 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,375 (2022)
Projected traffic10,000 by 2045
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$2.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Marine Drive over Jorgenson Slough built?

It was built in 1967, making it 58 years old in 2025.

What condition is Marine Drive over Jorgenson Slough 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 2023.

How much traffic does Marine Drive over Jorgenson Slough carry?

About 6,375 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is Marine Drive over Jorgenson Slough?

The structure is 61 ft (18.6 m) long with a longest span of 59 ft (18 m) and a deck 29 ft wide.

Who owns Marine Drive over Jorgenson Slough?

It is owned by the County Highway Agency.