US Bridges

Logan Ave N over Cedar River

Fair

King County, Washington · 0.4 MI E JCT SR-167 · Structure no. 085281000000000

Built
1973
52 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
200 ft
1 main span
Daily traffic
37,000
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Logan Ave N over Cedar River is a prestressed concrete continuous stringer/multi-beam or girder carrying Logan Ave N over Cedar River in King County, Washington. It was built in 1973, so it is 52 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 37,000 vehicles a day, roughly 14% of them trucks, projected to reach 45,000 by 2039. The structure is 200 ft (61 m) long and 100 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLogan Ave N
CrossesCedar River
Location0.4 MI E JCT SR-167
RouteCity Street 21020
CountyKing County
StateWashington
Coordinates47.48556, -122.20908
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating30 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length200 ft (61 m)
Longest span130 ft (39.6 m)
Deck width100 ft (30.5 m)
Roadway width86 ft (26.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,000 (2019)
Projected traffic45,000 by 2039
Trucks14%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$19.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Logan Ave N over Cedar River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Logan Ave N 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 June 2023.

How much traffic does Logan Ave N over Cedar River carry?

About 37,000 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is Logan Ave N over Cedar River?

The structure is 200 ft (61 m) long with a longest span of 130 ft (39.6 m) and a deck 100 ft wide.

Who owns Logan Ave N over Cedar River?

It is owned by the City or Municipal Highway Agency.