US Bridges

Bronson Way N over Cedar R

Fair

King County, Washington · 0.2 MI E JCT SR 515 · Structure no. 0002504A0000000

Built
1940
85 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Steel
Length
157 ft
1 main span
Daily traffic
22,000
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bronson Way N over Cedar R is a steel girder and floorbeam system carrying Bronson Way N over Cedar R in King County, Washington. It was built in 1940, so it is 85 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 22,000 vehicles a day, roughly 4% of them trucks, projected to reach 30,000 by 2040. The structure is 157 ft (47.9 m) long and 71 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesBronson Way N
CrossesCedar R
Location0.2 MI E JCT SR 515
RouteCity Street 900
CountyKing County
StateWashington
Coordinates47.48217, -122.20294
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating27.4 US tons
Inventory rating21.4 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 15
Structure length157 ft (47.9 m)
Longest span104 ft (31.7 m)
Deck width71 ft (21.7 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,000 (2020)
Projected traffic30,000 by 2040
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$4.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Bronson Way N over Cedar R built?

It was built in 1940, making it 85 years old in 2025.

What condition is Bronson Way N over Cedar R 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 September 2024.

How much traffic does Bronson Way N over Cedar R carry?

About 22,000 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Bronson Way N over Cedar R?

The structure is 157 ft (47.9 m) long with a longest span of 104 ft (31.7 m) and a deck 71 ft wide.

Who owns Bronson Way N over Cedar R?

It is owned by the City or Municipal Highway Agency.