US Bridges

83rd Ave S over Green River

Fair

King County, Washington · 0.7 MI E of SR-167 · Structure no. 085851000000000

Built
1990
35 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
250 ft
1 main span
Daily traffic
18,758
2024 count
Owner
County
County Highway Agency

About this bridge

83rd Ave S over Green River is a steel stringer/multi-beam or girder carrying 83rd Ave S over Green River in King County, Washington. It was built in 1990, so it is 35 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 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 18,758 vehicles a day, roughly 10% of them trucks, projected to reach 25,000 by 2044. The structure is 250 ft (76.2 m) long and 61 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries83rd Ave S
CrossesGreen River
Location0.7 MI E of SR-167
RouteCounty Highway 92643
CountyKing County
StateWashington
Coordinates47.361, -122.22992
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28 US tons
Inventory rating22 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length250 ft (76.2 m)
Longest span160 ft (48.8 m)
Deck width61 ft (18.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,758 (2024)
Projected traffic25,000 by 2044
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$15.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 83rd Ave S over Green River built?

It was built in 1990, making it 35 years old in 2025.

What condition is 83rd Ave S 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 August 2024.

How much traffic does 83rd Ave S over Green River carry?

About 18,758 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 83rd Ave S over Green River?

The structure is 250 ft (76.2 m) long with a longest span of 160 ft (48.8 m) and a deck 61 ft wide.

Who owns 83rd Ave S over Green River?

It is owned by the County Highway Agency.