US Bridges

Aberdeen Ave NE over SR 900

Good

King County, Washington · 0.3 E JCT I-405 · Structure no. 0008054A0000000

Built
1967
58 years old
Condition
Good
inspected June 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
225 ft
3 main spans
Daily traffic
2,700
2008 count
Owner
State
State Highway Agency

About this bridge

Aberdeen Ave NE over SR 900 is a concrete continuous box beam or girders - multiple carrying Aberdeen Ave NE over SR 900 in King County, Washington. It was built in 1967, so it is 58 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,700 vehicles a day, roughly 5% of them trucks, projected to reach 4,363 by 2036. The structure is 225 ft (68.6 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesAberdeen Ave NE
CrossesSR 900
Location0.3 E JCT I-405
RouteCity Street 0
Coordinates47.50103, -122.191
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating41.1 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length225 ft (68.6 m)
Longest span91 ft (27.7 m)
Deck width38 ft (11.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2008)
Projected traffic4,363 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$3.2 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Aberdeen Ave NE over SR 900 built?

It was built in 1967, making it 58 years old in 2025.

What condition is Aberdeen Ave NE over SR 900 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 June 2024.

How much traffic does Aberdeen Ave NE over SR 900 carry?

About 2,700 vehicles per day (2008 count), of which roughly 5% are trucks.

How long is Aberdeen Ave NE over SR 900?

The structure is 225 ft (68.6 m) long with a longest span of 91 ft (27.7 m) and a deck 38 ft wide.

Who owns Aberdeen Ave NE over SR 900?

It is owned by the State Highway Agency.