US Bridges

124 NE Ave NE over West Tributary

Good

King County, Washington · 1.0 S HWY 520 · Structure no. 089521000000000

Built
2024
1 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete
Length
28 ft
Daily traffic
8,500
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

124 NE Ave NE over West Tributary is a concrete culvert carrying 124 NE Ave NE over West Tributary in King County, Washington. It was built in 2024, so it is 1 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,500 vehicles a day, projected to reach 10,855 by 2044. The structure is 28 ft (8.4 m) long and 114 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries124 NE Ave NE
CrossesWest Tributary
Location1.0 S HWY 520
RouteCity Street 75
Coordinates47.62678, -122.17532
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.5 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadHL 93
Structure length28 ft (8.4 m)
Longest span25 ft (7.6 m)
Deck width114 ft (34.7 m)
Roadway width103 ft (31.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,500 (2021)
Projected traffic10,855 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 statusHistorical significance not determinable at this time
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$1.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 124 NE Ave NE over West Tributary built?

It was built in 2024, making it 1 years old in 2025.

What condition is 124 NE Ave NE over West Tributary in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does 124 NE Ave NE over West Tributary carry?

About 8,500 vehicles per day (2021 count).

How long is 124 NE Ave NE over West Tributary?

The structure is 28 ft (8.4 m) long with a longest span of 25 ft (7.6 m) and a deck 114 ft wide.

Who owns 124 NE Ave NE over West Tributary?

It is owned by the City or Municipal Highway Agency.