US Bridges

I-90 over Homestead Valley RD

Fair

King County, Washington · 7.5 E JCT SR 202 · Structure no. 0009534A0000000

Built
1974
51 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
104 ft
1 main span
Daily traffic
18,876
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over Homestead Valley RD is a prestressed concrete stringer/multi-beam or girder carrying I-90 over Homestead Valley RD in King County, Washington. It was built in 1974, so it is 51 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 18,876 vehicles a day, roughly 18% of them trucks, projected to reach 25,733 by 2039. The structure is 104 ft (31.7 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90
CrossesHomestead Valley RD
Location7.5 E JCT SR 202
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.443, -121.66842
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.9 US tons
Inventory rating22.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length104 ft (31.7 m)
Longest span99 ft (30.2 m)
Deck width70 ft (21.2 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,876 (2023)
Projected traffic25,733 by 2039
Trucks18%
Lanes on structure4
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$3.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 over Homestead Valley RD built?

It was built in 1974, making it 51 years old in 2025.

What condition is I-90 over Homestead Valley RD 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 October 2023.

How much traffic does I-90 over Homestead Valley RD carry?

About 18,876 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I-90 over Homestead Valley RD?

The structure is 104 ft (31.7 m) long with a longest span of 99 ft (30.2 m) and a deck 70 ft wide.

Who owns I-90 over Homestead Valley RD?

It is owned by the State Highway Agency.