US Bridges

20 S 06 W 10.03: over Siuslaw River

Fair

Lane County, Oregon · 0.2 Miles SW of County Ro · Structure no. 0000000L1439126

Built
1963
62 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Concrete Continuous
Length
170 ft
3 main spans
Daily traffic
30
2021 count
Owner
Federal
Bureau of Land Management

About this bridge

20 S 06 W 10.03: over Siuslaw River is a concrete continuous tee beam carrying 20 S 06 W 10.03: over Siuslaw River in Lane County, Oregon. It was built in 1963, so it is 62 years old, older than the Oregon average of 49.9 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 50 by 2041. The structure is 170 ft (51.8 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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Carries20 S 06 W 10.03:
CrossesSiuslaw River
Location0.2 Miles SW of County Ro
RouteFederal Lands Road 0
CountyLane County
StateOregon
Coordinates43.84361, -123.39722
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating23.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length170 ft (51.8 m)
Longest span70 ft (21.3 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2021)
Projected traffic50 by 2041
Trucks10%
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

OwnerBureau of Land Management
Maintained byBureau of Land Management
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost$1,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 20 S 06 W 10.03: over Siuslaw River built?

It was built in 1963, making it 62 years old in 2025.

What condition is 20 S 06 W 10.03: over Siuslaw 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 February 2023.

How much traffic does 20 S 06 W 10.03: over Siuslaw River carry?

About 30 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is 20 S 06 W 10.03: over Siuslaw River?

The structure is 170 ft (51.8 m) long with a longest span of 70 ft (21.3 m) and a deck 16 ft wide.

Who owns 20 S 06 W 10.03: over Siuslaw River?

It is owned by the Bureau of Land Management.