US Bridges

I-405 over SR 167

Fair

King County, Washington · 1.3 N JCT SR 181 · Structure no. 0007376A0000000

Built
1964
61 years old, rebuilt 1989
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
188 ft
4 main spans
Daily traffic
91,705
2023 count
Owner
State
State Highway Agency

About this bridge

I-405 over SR 167 is a prestressed concrete stringer/multi-beam or girder carrying I-405 over SR 167 in King County, Washington. It was built in 1964 and reconstructed in 1989, 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 91,705 vehicles a day, roughly 6% of them trucks, projected to reach 133,458 by 2039. The structure is 188 ft (57.3 m) long and 189 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-405
CrossesSR 167
Location1.3 N JCT SR 181
RouteInterstate 405
CountyKing County
StateWashington
Coordinates47.46784, -122.21835
Functional classUrban 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 inspectionJune 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating23.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length188 ft (57.3 m)
Longest span56 ft (17.1 m)
Deck width189 ft (57.6 m)
Roadway width184 ft (56.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic91,705 (2023)
Projected traffic133,458 by 2039
Trucks6%
Lanes on structure9
Traffic directionTwo-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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$16.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-405 over SR 167 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1989.

What condition is I-405 over SR 167 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-405 over SR 167 carry?

About 91,705 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I-405 over SR 167?

The structure is 188 ft (57.3 m) long with a longest span of 56 ft (17.1 m) and a deck 189 ft wide.

Who owns I-405 over SR 167?

It is owned by the State Highway Agency.