US Bridges

W-W RAMP/3rd ST over C ST SW

Good

King County, Washington · 1.0 E JCT SR 167 · Structure no. 002004250000000

Built
2002
23 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
180 ft
1 main span
Daily traffic
9,417
2023 count
Owner
State
State Highway Agency

About this bridge

W-W RAMP/3rd ST over C ST SW is a steel stringer/multi-beam or girder carrying W-W RAMP/3rd ST over C ST SW in King County, Washington. It was built in 2002, so it is 23 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 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 9,417 vehicles a day, roughly 10% of them trucks, projected to reach 13,600 by 2039. The structure is 180 ft (54.9 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesW-W RAMP/3rd ST
CrossesC ST SW
Location1.0 E JCT SR 167
RouteState Highway 18
CountyKing County
StateWashington
Coordinates47.305, -122.233
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length180 ft (54.9 m)
Longest span180 ft (54.9 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,417 (2023)
Projected traffic13,600 by 2039
Trucks10%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.3 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was W-W RAMP/3rd ST over C ST SW built?

It was built in 2002, making it 23 years old in 2025.

What condition is W-W RAMP/3rd ST over C ST SW 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 November 2023.

How much traffic does W-W RAMP/3rd ST over C ST SW carry?

About 9,417 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is W-W RAMP/3rd ST over C ST SW?

The structure is 180 ft (54.9 m) long with a longest span of 180 ft (54.9 m) and a deck 28 ft wide.

Who owns W-W RAMP/3rd ST over C ST SW?

It is owned by the State Highway Agency.