US Bridges

Phinney Ave over N 57th ST

Fair

King County, Washington · 5700 Phinney Ave N · Structure no. 085085000000000

Built
1900
125 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete
Length
60 ft
1 main span
Daily traffic
12,400
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Phinney Ave over N 57th ST is a concrete tee beam carrying Phinney Ave over N 57th ST in King County, Washington. It was built in 1900, so it is 125 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 12,400 vehicles a day, roughly 5% of them trucks, projected to reach 14,500 by 2043. The structure is 60 ft (18.3 m) long and 86 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesPhinney Ave
CrossesN 57th ST
Location5700 Phinney Ave N
RouteCity Street 1140
CountyKing County
StateWashington
Coordinates47.67056, -122.35444
Functional classUrban Minor 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
Deck7 GoodSome minor problems.
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 evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating41 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length60 ft (18.3 m)
Longest span30 ft (9.1 m)
Deck width86 ft (26.2 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,400 (2019)
Projected traffic14,500 by 2043
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$2.6 million (2031 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Phinney Ave over N 57th ST built?

It was built in 1900, making it 125 years old in 2025.

What condition is Phinney Ave over N 57th ST 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 Phinney Ave over N 57th ST carry?

About 12,400 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Phinney Ave over N 57th ST?

The structure is 60 ft (18.3 m) long with a longest span of 30 ft (9.1 m) and a deck 86 ft wide.

Who owns Phinney Ave over N 57th ST?

It is owned by the City or Municipal Highway Agency.