US Bridges

SR 160 over Puget Sound @ Pt Vashon

Good

King County, Washington · N End Vashon Island · Structure no. 0014968A0000000

Built
1997
28 years old
Condition
Good
inspected July 2023
Type
Movable - Lift
Steel
Length
105 ft
1 main span
Daily traffic
4,675
2010 count
Owner
State
State Highway Agency

About this bridge

SR 160 over Puget Sound @ Pt Vashon is a steel movable - lift carrying SR 160 over Puget Sound @ Pt Vashon in King County, Washington. It was built in 1997, so it is 28 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 4,675 vehicles a day, roughly 1% of them trucks, projected to reach 7,349 by 2036. The structure is 105 ft (32 m) long and 23 ft wide.

Location

Open in Google Maps
CarriesSR 160
CrossesPuget Sound @ Pt Vashon
LocationN End Vashon Island
RouteState Highway 160
CountyKing County
StateWashington
Coordinates47.51064, -122.46378
Functional classUrban Minor Arterial

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be 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 rating30 US tons
Inventory rating18 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckClosed grating
Main spans1
Design loadHS 20
Structure length105 ft (32 m)
Longest span80 ft (24.4 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic4,675 (2010)
Projected traffic7,349 by 2036
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollToll bridge
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$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 160 over Puget Sound @ Pt Vashon built?

It was built in 1997, making it 28 years old in 2025.

What condition is SR 160 over Puget Sound @ Pt Vashon 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 July 2023.

How much traffic does SR 160 over Puget Sound @ Pt Vashon carry?

About 4,675 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is SR 160 over Puget Sound @ Pt Vashon?

The structure is 105 ft (32 m) long with a longest span of 80 ft (24.4 m) and a deck 23 ft wide.

Who owns SR 160 over Puget Sound @ Pt Vashon?

It is owned by the State Highway Agency.