US Bridges

5th ST N over S Fk Skykomish River

Fair

King County, Washington · 0.1 S JCT US 2 · Structure no. 0002397A0000000

Built
1939
86 years old
Condition
Fair
inspected April 2024
Type
Truss - Thru
Steel
Length
279 ft
1 main span
Daily traffic
1,160
2002 count
Owner
State
State Highway Agency

About this bridge

5th ST N over S Fk Skykomish River is a steel truss - thru carrying 5th ST N over S Fk Skykomish River in King County, Washington. It was built in 1939, so it is 86 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 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 1,160 vehicles a day, roughly 5% of them trucks, projected to reach 1,554 by 2036. The structure is 279 ft (85 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries5th ST N
CrossesS Fk Skykomish River
Location0.1 S JCT US 2
RouteCity Street 2
CountyKing County
StateWashington
Coordinates47.71034, -121.36094
Functional classRural 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 15
Structure length279 ft (85 m)
Longest span220 ft (67.1 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic1,160 (2002)
Projected traffic1,554 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 5th ST N over S Fk Skykomish River built?

It was built in 1939, making it 86 years old in 2025.

What condition is 5th ST N over S Fk Skykomish River 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 April 2024.

How much traffic does 5th ST N over S Fk Skykomish River carry?

About 1,160 vehicles per day (2002 count), of which roughly 5% are trucks.

How long is 5th ST N over S Fk Skykomish River?

The structure is 279 ft (85 m) long with a longest span of 220 ft (67.1 m) and a deck 25 ft wide.

Who owns 5th ST N over S Fk Skykomish River?

It is owned by the State Highway Agency.