US Bridges

SR 522 over W-S Ramp I-5

Fair

King County, Washington · 0.1 E JCT I-5 · Structure no. 0006911D0000000

Built
1962
63 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
358 ft
5 main spans
Daily traffic
14,052
2023 count
Owner
State
State Highway Agency

About this bridge

SR 522 over W-S Ramp I-5 is a concrete continuous box beam or girders - multiple carrying SR 522 over W-S Ramp I-5 in King County, Washington. It was built in 1962, so it is 63 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 14,052 vehicles a day, roughly 2% of them trucks, projected to reach 22,501 by 2039. The structure is 358 ft (109.1 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 522
CrossesW-S Ramp I-5
Location0.1 E JCT I-5
RouteState Highway 522
CountyKing County
StateWashington
Coordinates47.68206, -122.32042
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.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating84 US tons
Inventory rating48.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length358 ft (109.1 m)
Longest span93 ft (28.3 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,052 (2023)
Projected traffic22,501 by 2039
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
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$4.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 522 over W-S Ramp I-5 built?

It was built in 1962, making it 63 years old in 2025.

What condition is SR 522 over W-S Ramp 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 April 2023.

How much traffic does SR 522 over W-S Ramp I-5 carry?

About 14,052 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is SR 522 over W-S Ramp I-5?

The structure is 358 ft (109.1 m) long with a longest span of 93 ft (28.3 m) and a deck 27 ft wide.

Who owns SR 522 over W-S Ramp I-5?

It is owned by the State Highway Agency.