US Bridges

Harbor Ave SW over RR

Fair

King County, Washington · SW Spokane ST & Admiral · Structure no. 086869000000000

Built
2001
24 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
124 ft
2 main spans
Daily traffic
9,546
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Harbor Ave SW over RR is a prestressed concrete stringer/multi-beam or girder carrying Harbor Ave SW over RR in King County, Washington. It was built in 2001, so it is 24 years old, younger 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 5 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 9,546 vehicles a day, roughly 5% of them trucks, projected to reach 11,646 by 2042. The structure is 124 ft (37.8 m) long and 23 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHarbor Ave SW
CrossesRR
LocationSW Spokane ST & Admiral
RouteCity Street 1140
CountyKing County
StateWashington
Coordinates47.57145, -122.37053
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.4 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length124 ft (37.8 m)
Longest span63 ft (19.2 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,546 (2022)
Projected traffic11,646 by 2042
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$1.3 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Harbor Ave SW over RR built?

It was built in 2001, making it 24 years old in 2025.

What condition is Harbor Ave SW over RR 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 Harbor Ave SW over RR carry?

About 9,546 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Harbor Ave SW over RR?

The structure is 124 ft (37.8 m) long with a longest span of 63 ft (19.2 m) and a deck 23 ft wide.

Who owns Harbor Ave SW over RR?

It is owned by the City or Municipal Highway Agency.