US Bridges

Beacon Ave S over So Ryan Wy

Fair

King County, Washington · 0.5 MI E of I-5 · Structure no. 079968000000000

Built
1971
54 years old, rebuilt 2018
Condition
Fair
inspected April 2023
Type
Girder and Floorbeam System
Steel
Length
70 ft
1 main span
Daily traffic
379
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Beacon Ave S over So Ryan Wy is a steel girder and floorbeam system carrying Beacon Ave S over So Ryan Wy in King County, Washington. It was built in 1971 and reconstructed in 2018, so it is 54 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 379 vehicles a day, roughly 17% of them trucks, projected to reach 550 by 2042. The structure is 70 ft (21.3 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesBeacon Ave S
CrossesSo Ryan Wy
Location0.5 MI E of I-5
RouteCity Street 1203
CountyKing County
StateWashington
Coordinates47.50953, -122.27147
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span68 ft (20.7 m)
Deck width42 ft (12.9 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic379 (2022)
Projected traffic550 by 2042
Trucks17%
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

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$2.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Beacon Ave S over So Ryan Wy built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2018.

What condition is Beacon Ave S over So Ryan Wy 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 April 2023.

How much traffic does Beacon Ave S over So Ryan Wy carry?

About 379 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is Beacon Ave S over So Ryan Wy?

The structure is 70 ft (21.3 m) long with a longest span of 68 ft (20.7 m) and a deck 42 ft wide.

Who owns Beacon Ave S over So Ryan Wy?

It is owned by the City or Municipal Highway Agency.