Structure 5565A0000000 · Kitsap County, WA

SR 303 over Port Washington Narrows

Carries SR 303 over Port Washington Narrows, 0.9 N Jct SR 304.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,717 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

1,717 ft end to end, longest span 250 ft: about 4.8 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a girder bridge.

Built195868 years old
Length1716.9 ft523.3 m
Daily traffic21,462counted 2023
Last inspectedOctober 2024every 24 months

Location

StateWashington
CountyKitsap
Location0.9 N Jct SR 304
CarriesSR 303
CrossesPort Washington Narrows
Coordinates47.57806, -122.63273

Physical Characteristics

MaterialSteel Continuous
DesignGirder and Floorbeam
Total Length1716.9 ft (523.3 m)
Max Span250.0 ft (76.2 m)
Deck Width67.6 ft (20.6 m)
Deck Area10780.0 sq m
Main Spans3
Year Built1958

Traffic

Avg Daily Traffic21,462 (2023)
Truck Traffic3%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical3 — Scour critical
Structure Number0005565A0000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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