US Bridges

SR 169 over Cedar River

Fair

King County, Washington · 7.9 N JCT SR 18 · Structure no. 0014298A0000000

Built
1994
31 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
156 ft
2 main spans
Daily traffic
19,730
2023 count
Owner
State
State Highway Agency

About this bridge

SR 169 over Cedar River is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 169 over Cedar River in King County, Washington. It was built in 1994, so it is 31 years old, younger 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 19,730 vehicles a day, roughly 6% of them trucks, projected to reach 30,465 by 2039. The structure is 156 ft (47.5 m) long and 74 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSR 169
CrossesCedar River
Location7.9 N JCT SR 18
RouteState Highway 169
CountyKing County
StateWashington
Coordinates47.46944, -122.15937
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length156 ft (47.5 m)
Longest span102 ft (31.1 m)
Deck width74 ft (22.5 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,730 (2023)
Projected traffic30,465 by 2039
Trucks6%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 169 over Cedar River built?

It was built in 1994, making it 31 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 19,730 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 169 over Cedar River?

The structure is 156 ft (47.5 m) long with a longest span of 102 ft (31.1 m) and a deck 74 ft wide.

Who owns SR 169 over Cedar River?

It is owned by the State Highway Agency.