US Bridges

SR 303 over Port Washington Narrows

Fair

Kitsap County, Washington · 0.9 N JCT SR 304 · Structure no. 0005565A0000000

Built
1958
67 years old
Condition
Fair
inspected October 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
1,717 ft
3 main spans
Daily traffic
21,462
2023 count
Owner
State
State Highway Agency

About this bridge

SR 303 over Port Washington Narrows is a steel continuous girder and floorbeam system carrying SR 303 over Port Washington Narrows in Kitsap County, Washington. It was built in 1958, so it is 67 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 21,462 vehicles a day, roughly 3% of them trucks, projected to reach 28,919 by 2039. The structure is 1,717 ft (523.3 m) long and 68 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSR 303
CrossesPort Washington Narrows
Location0.9 N JCT SR 304
RouteState Highway 303
CountyKitsap County
StateWashington
Coordinates47.57806, -122.63273
Functional classUrban Other Principal 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.
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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+12 approach)
Design loadHS 20
Structure length1,717 ft (523.3 m)
Longest span250 ft (76.2 m)
Deck width68 ft (20.6 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,462 (2023)
Projected traffic28,919 by 2039
Trucks3%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
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 statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$45.7 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR 303 over Port Washington Narrows built?

It was built in 1958, making it 67 years old in 2025.

What condition is SR 303 over Port Washington Narrows 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 SR 303 over Port Washington Narrows carry?

About 21,462 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is SR 303 over Port Washington Narrows?

The structure is 1,717 ft (523.3 m) long with a longest span of 250 ft (76.2 m) and a deck 68 ft wide.

Who owns SR 303 over Port Washington Narrows?

It is owned by the State Highway Agency.