US Bridges

Road over East Fork Foss River

Fair

King County, Washington · 0.5 MI S of 68/6835 JCT · Structure no. 060506000000999

Built
1959
66 years old, rebuilt 2009
Condition
Fair
inspected October 2024
Type
Frame
Concrete Continuous
Length
110 ft
3 main spans
Daily traffic
60
1965 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over East Fork Foss River is a concrete continuous frame carrying Road over East Fork Foss River in King County, Washington. It was built in 1959 and reconstructed in 2009, so it is 66 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 60 vehicles a day, projected to reach 90 by 2045. The structure is 110 ft (33.5 m) long and 18 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesRoad
CrossesEast Fork Foss River
Location0.5 MI S of 68/6835 JCT
RouteFederal Lands Road 6835
Coordinates47.65306, -121.28583
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37 US tons
Inventory rating26 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length110 ft (33.5 m)
Longest span70 ft (21.3 m)
Deck width18 ft (5.6 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (1965)
Projected traffic90 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road over East Fork Foss River built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2009.

What condition is Road over East Fork Foss 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 October 2024.

How much traffic does Road over East Fork Foss River carry?

About 60 vehicles per day (1965 count).

How long is Road over East Fork Foss River?

The structure is 110 ft (33.5 m) long with a longest span of 70 ft (21.3 m) and a deck 18 ft wide.

Who owns Road over East Fork Foss River?

It is owned by the U.S. Forest Service.