US Bridges

NW Woodbine Way over Trail - Mary Ave NW

Fair

King County, Washington · 1500 NW Woodbine Way · Structure no. 085456000000000

Built
1928
97 years old
Condition
Fair
inspected March 2024
Type
Arch - Deck
Concrete
Length
21 ft
1 main span
Daily traffic
1,000
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

NW Woodbine Way over Trail - Mary Ave NW is a concrete arch - deck carrying NW Woodbine Way over Trail - Mary Ave NW in King County, Washington. It was built in 1928, so it is 97 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 1,000 vehicles a day, roughly 5% of them trucks, projected to reach 1,200 by 2040. The structure is 21 ft (6.4 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNW Woodbine Way
CrossesTrail - Mary Ave NW
Location1500 NW Woodbine Way
RouteCity Street 1140
CountyKing County
StateWashington
Coordinates47.70832, -122.37701
Functional classUrban Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating106.8 US tons
Inventory rating84.7 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width27 ft (8.1 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2020)
Projected traffic1,200 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesPedestrian / bicycle
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NW Woodbine Way over Trail - Mary Ave NW built?

It was built in 1928, making it 97 years old in 2025.

What condition is NW Woodbine Way over Trail - Mary Ave NW 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 March 2024.

How much traffic does NW Woodbine Way over Trail - Mary Ave NW carry?

About 1,000 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is NW Woodbine Way over Trail - Mary Ave NW?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 27 ft wide.

Who owns NW Woodbine Way over Trail - Mary Ave NW?

It is owned by the City or Municipal Highway Agency.