US Bridges

Spring ST over I-5

Fair

King County, Washington · 1.1 N JCT I-90 · Structure no. 0007110D0000000

Built
1964
61 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
279 ft
3 main spans
Daily traffic
10,000
2018 count
Owner
State
State Highway Agency

About this bridge

Spring ST over I-5 is a concrete continuous box beam or girders - multiple carrying Spring ST over I-5 in King County, Washington. It was built in 1964, so it is 61 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 10,000 vehicles a day, roughly 5% of them trucks, projected to reach 15,000 by 2039. The structure is 279 ft (85 m) long and 58 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSpring ST
CrossesI-5
Location1.1 N JCT I-90
RouteCity Street 0
CountyKing County
StateWashington
Coordinates47.60781, -122.33125
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.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length279 ft (85 m)
Longest span116 ft (35.4 m)
Deck width58 ft (17.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2018)
Projected traffic15,000 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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$7.7 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Spring ST over I-5 built?

It was built in 1964, making it 61 years old in 2025.

What condition is Spring ST over I-5 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 May 2023.

How much traffic does Spring ST over I-5 carry?

About 10,000 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Spring ST over I-5?

The structure is 279 ft (85 m) long with a longest span of 116 ft (35.4 m) and a deck 58 ft wide.

Who owns Spring ST over I-5?

It is owned by the State Highway Agency.