US Bridges

20 S 06 W 09.00: over Siuslaw River

Fair

Lane County, Oregon · 0.9 Miles S of Siuslaw Ri · Structure no. 0000000L1439129

Built
1961
64 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
60 ft
4 main spans
Daily traffic
20
2023 count
Owner
Federal
Bureau of Land Management

About this bridge

20 S 06 W 09.00: over Siuslaw River is a concrete slab carrying 20 S 06 W 09.00: over Siuslaw River in Lane County, Oregon. It was built in 1961, so it is 64 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 35 by 2043. The structure is 60 ft (18.3 m) long and 14 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
Carries20 S 06 W 09.00:
CrossesSiuslaw River
Location0.9 Miles S of Siuslaw Ri
RouteFederal Lands Road 0
CountyLane County
StateOregon
Coordinates43.85556, -123.43306
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33.1 US tons
Inventory rating25.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span15 ft (4.6 m)
Deck width14 ft (4.3 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic35 by 2043
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$6,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 20 S 06 W 09.00: over Siuslaw River built?

It was built in 1961, making it 64 years old in 2025.

What condition is 20 S 06 W 09.00: 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 09.00: over Siuslaw River carry?

About 20 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 20 S 06 W 09.00: over Siuslaw River?

The structure is 60 ft (18.3 m) long with a longest span of 15 ft (4.6 m) and a deck 14 ft wide.

Who owns 20 S 06 W 09.00: over Siuslaw River?

It is owned by the Bureau of Land Management.