US Bridges

City ST - 76th Ave over I-90

Good

King County, Washington · 4.0 E JCT I-5 · Structure no. 0013192A0000000

Built
1989
36 years old
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
360 ft
4 main spans
Daily traffic
12,230
2002 count
Owner
State
State Highway Agency

About this bridge

City ST - 76th Ave over I-90 is a concrete continuous box beam or girders - multiple carrying City ST - 76th Ave over I-90 in King County, Washington. It was built in 1989, so it is 36 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 12,230 vehicles a day, roughly 2% of them trucks, projected to reach 16,388 by 2036. The structure is 360 ft (109.7 m) long and 103 ft wide.

Location

Open in Google Maps
CarriesCity ST - 76th Ave
CrossesI-90
Location4.0 E JCT I-5
RouteCity Street 0
CountyKing County
StateWashington
Coordinates47.58928, -122.23772
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length360 ft (109.7 m)
Longest span132 ft (40.2 m)
Deck width103 ft (31.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,230 (2002)
Projected traffic16,388 by 2036
Trucks2%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$7.2 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was City ST - 76th Ave over I-90 built?

It was built in 1989, making it 36 years old in 2025.

What condition is City ST - 76th Ave over I-90 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does City ST - 76th Ave over I-90 carry?

About 12,230 vehicles per day (2002 count), of which roughly 2% are trucks.

How long is City ST - 76th Ave over I-90?

The structure is 360 ft (109.7 m) long with a longest span of 132 ft (40.2 m) and a deck 103 ft wide.

Who owns City ST - 76th Ave over I-90?

It is owned by the State Highway Agency.