US Bridges

Stehekin Valley Ro over Stehekin River

Fair

Chelan County, Washington · 11.3 Miles NW of Stehekin · Structure no. 9470008P0000000

Built
1974
51 years old
Condition
Fair
inspected October 2024
Type
Girder and Floorbeam System
Steel
Length
81 ft
1 main span
Daily traffic
20
2019 count
Owner
Federal
National Park Service

About this bridge

Stehekin Valley Ro over Stehekin River is a steel girder and floorbeam system carrying Stehekin Valley Ro over Stehekin River in Chelan County, Washington. It was built in 1974, so it is 51 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 20 vehicles a day, roughly 1% of them trucks, projected to reach 40 by 2039. The structure is 81 ft (24.8 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesStehekin Valley Ro
CrossesStehekin River
Location11.3 Miles NW of Stehekin
RouteFederal Lands Road 10
CountyChelan County
StateWashington
Coordinates48.38028, -120.83861
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating29 US tons
Inventory rating22 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 15
Structure length81 ft (24.8 m)
Longest span76 ft (23.1 m)
Deck width18 ft (5.4 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2019)
Projected traffic40 by 2039
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$29,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stehekin Valley Ro over Stehekin River built?

It was built in 1974, making it 51 years old in 2025.

What condition is Stehekin Valley Ro over Stehekin 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 Stehekin Valley Ro over Stehekin River carry?

About 20 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Stehekin Valley Ro over Stehekin River?

The structure is 81 ft (24.8 m) long with a longest span of 76 ft (23.1 m) and a deck 18 ft wide.

Who owns Stehekin Valley Ro over Stehekin River?

It is owned by the National Park Service.