US Bridges

SR 169 over Cedar River

Fair

King County, Washington · 0.8 N JCT SR 18 · Structure no. 0003703A0000000

Built
1950
75 years old
Condition
Fair
inspected April 2023
Type
Girder and Floorbeam System
Steel
Length
130 ft
1 main span
Daily traffic
22,007
2023 count
Owner
State
State Highway Agency

About this bridge

SR 169 over Cedar River is a steel girder and floorbeam system carrying SR 169 over Cedar River in King County, Washington. It was built in 1950, so it is 75 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 22,007 vehicles a day, roughly 9% of them trucks, projected to reach 32,614 by 2039. The structure is 130 ft (39.6 m) long and 40 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSR 169
CrossesCedar River
Location0.8 N JCT SR 18
RouteState Highway 169
CountyKing County
StateWashington
Coordinates47.41842, -122.04631
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
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 rating48 US tons
Inventory rating28 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length130 ft (39.6 m)
Longest span125 ft (38.1 m)
Deck width40 ft (12.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,007 (2023)
Projected traffic32,614 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
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$2.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 169 over Cedar River built?

It was built in 1950, making it 75 years old in 2025.

What condition is SR 169 over Cedar River 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 April 2023.

How much traffic does SR 169 over Cedar River carry?

About 22,007 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SR 169 over Cedar River?

The structure is 130 ft (39.6 m) long with a longest span of 125 ft (38.1 m) and a deck 40 ft wide.

Who owns SR 169 over Cedar River?

It is owned by the State Highway Agency.