US Bridges

Stevens Canyon Roa over Ravine

Fair

Lewis County, Washington · 12.5 Miles West of Jct. U · Structure no. 9450031P0000000

Built
1952
73 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
133 ft
3 main spans
Daily traffic
1,500
2019 count
Owner
Federal
National Park Service

About this bridge

Stevens Canyon Roa over Ravine is a concrete tee beam carrying Stevens Canyon Roa over Ravine in Lewis County, Washington. It was built in 1952, so it is 73 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 1,500 vehicles a day, roughly 15% of them trucks, projected to reach 3,000 by 2039. The structure is 133 ft (40.4 m) long and 33 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesStevens Canyon Roa
CrossesRavine
Location12.5 Miles West of Jct. U
RouteFederal Lands Road 13
Coordinates46.76708, -121.67311
Functional classRural Minor Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38 US tons
Inventory rating22 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length133 ft (40.4 m)
Longest span54 ft (16.6 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2019)
Projected traffic3,000 by 2039
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
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$203,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stevens Canyon Roa over Ravine built?

It was built in 1952, making it 73 years old in 2025.

What condition is Stevens Canyon Roa over Ravine 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 August 2024.

How much traffic does Stevens Canyon Roa over Ravine carry?

About 1,500 vehicles per day (2019 count), of which roughly 15% are trucks.

How long is Stevens Canyon Roa over Ravine?

The structure is 133 ft (40.4 m) long with a longest span of 54 ft (16.6 m) and a deck 33 ft wide.

Who owns Stevens Canyon Roa over Ravine?

It is owned by the National Park Service.