US Bridges

15th ST NW over SR 167

Fair

King County, Washington · 1.5N JCT SR 18 · Structure no. 0008853B0000000

Built
1972
53 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
275 ft
2 main spans
Daily traffic
26,767
2016 count
Owner
State
State Highway Agency

About this bridge

15th ST NW over SR 167 is a prestressed concrete continuous stringer/multi-beam or girder carrying 15th ST NW over SR 167 in King County, Washington. It was built in 1972, so it is 53 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 26,767 vehicles a day, roughly 5% of them trucks, projected to reach 41,920 by 2038. The structure is 275 ft (83.7 m) long and 85 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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Carries15th ST NW
CrossesSR 167
Location1.5N JCT SR 18
RouteCity Street 0
CountyKing County
StateWashington
Coordinates47.32242, -122.24553
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating48.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length275 ft (83.7 m)
Longest span133 ft (40.5 m)
Deck width85 ft (26 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,767 (2016)
Projected traffic41,920 by 2038
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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$11.2 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 15th ST NW over SR 167 built?

It was built in 1972, making it 53 years old in 2025.

What condition is 15th ST NW 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 February 2023.

How much traffic does 15th ST NW over SR 167 carry?

About 26,767 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is 15th ST NW over SR 167?

The structure is 275 ft (83.7 m) long with a longest span of 133 ft (40.5 m) and a deck 85 ft wide.

Who owns 15th ST NW over SR 167?

It is owned by the State Highway Agency.