US Bridges

I-90 over SR 202

Fair

King County, Washington · 4.9 E JCT SR 18 · Structure no. 0010124C0000000

Built
1976
49 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
187 ft
3 main spans
Daily traffic
21,667
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over SR 202 is a concrete continuous box beam or girders - multiple carrying I-90 over SR 202 in King County, Washington. It was built in 1976, so it is 49 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 21,667 vehicles a day, roughly 18% of them trucks, projected to reach 28,047 by 2039. The structure is 187 ft (57 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90
CrossesSR 202
Location4.9 E JCT SR 18
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.48844, -121.79696
Functional classRural Principal Arterial - Interstate

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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.9 US tons
Inventory rating21.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length187 ft (57 m)
Longest span93 ft (28.3 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,667 (2023)
Projected traffic28,047 by 2039
Trucks18%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$4.8 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 over SR 202 built?

It was built in 1976, making it 49 years old in 2025.

What condition is I-90 over SR 202 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 June 2023.

How much traffic does I-90 over SR 202 carry?

About 21,667 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I-90 over SR 202?

The structure is 187 ft (57 m) long with a longest span of 93 ft (28.3 m) and a deck 55 ft wide.

Who owns I-90 over SR 202?

It is owned by the State Highway Agency.