US Bridges

SR 104 over Puget Sound @ Edmonds

Fair

Snohomish County, Washington · 0.1 W JCT SR 524 · Structure no. 0014541A0000000

Built
1995
30 years old
Condition
Fair
inspected September 2023
Type
Movable - Lift
Steel
Length
105 ft
1 main span
Daily traffic
5,870
2010 count
Owner
State
State Highway Agency

About this bridge

SR 104 over Puget Sound @ Edmonds is a steel movable - lift carrying SR 104 over Puget Sound @ Edmonds in Snohomish County, Washington. It was built in 1995, so it is 30 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 5,870 vehicles a day, roughly 8% of them trucks, projected to reach 9,991 by 2036. The structure is 105 ft (32 m) long and 24 ft wide. If it were closed, the detour would be 42.9 mi (69 km).

Location

Open in Google Maps
CarriesSR 104
CrossesPuget Sound @ Edmonds
Location0.1 W JCT SR 524
RouteState Highway 104
CountySnohomish County
StateWashington
Coordinates47.81325, -122.38506
Functional classUrban Other Principal 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckClosed grating
Main spans1
Design loadHS 20
Structure length105 ft (32 m)
Longest span80 ft (24.4 m)
Deck width24 ft (7.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic5,870 (2010)
Projected traffic9,991 by 2036
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.9 mi (69 km)
TollToll bridge
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 104 over Puget Sound @ Edmonds built?

It was built in 1995, making it 30 years old in 2025.

What condition is SR 104 over Puget Sound @ Edmonds 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 September 2023.

How much traffic does SR 104 over Puget Sound @ Edmonds carry?

About 5,870 vehicles per day (2010 count), of which roughly 8% are trucks.

How long is SR 104 over Puget Sound @ Edmonds?

The structure is 105 ft (32 m) long with a longest span of 80 ft (24.4 m) and a deck 24 ft wide.

Who owns SR 104 over Puget Sound @ Edmonds?

It is owned by the State Highway Agency.