US Bridges

8th Street NE over Green River

Fair

King County, Washington · 0.4 MI E of Harvey RD · Structure no. 080797000000000

Built
1973
52 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
137 ft
1 main span
Daily traffic
21,100
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

8th Street NE over Green River is a concrete box beam or girders - multiple carrying 8th Street NE over Green River in King County, Washington. It was built in 1973, so it is 52 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 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 21,100 vehicles a day, roughly 15% of them trucks, projected to reach 38,100 by 2040. The structure is 137 ft (41.9 m) long and 59 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries8th Street NE
CrossesGreen River
Location0.4 MI E of Harvey RD
RouteCity Street 55
Coordinates47.3155, -122.20619
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.1 US tons
Inventory rating31.7 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length137 ft (41.9 m)
Longest span137 ft (41.9 m)
Deck width59 ft (17.9 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,100 (2020)
Projected traffic38,100 by 2040
Trucks15%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 8th Street NE over Green River built?

It was built in 1973, making it 52 years old in 2025.

What condition is 8th Street NE over Green River 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 2024.

How much traffic does 8th Street NE over Green River carry?

About 21,100 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is 8th Street NE over Green River?

The structure is 137 ft (41.9 m) long with a longest span of 137 ft (41.9 m) and a deck 59 ft wide.

Who owns 8th Street NE over Green River?

It is owned by the City or Municipal Highway Agency.