US Bridges

Road over North Fork Siuslaw River

Fair

Lane County, Oregon · No Data Entered · Structure no. 061202000001169

Built
1959
66 years old
Condition
Fair
inspected June 2024
Type
Frame
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
5
1996 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over North Fork Siuslaw River is a concrete continuous frame carrying Road over North Fork Siuslaw River in Lane County, Oregon. It was built in 1959, so it is 66 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 5 vehicles a day, projected to reach 7 by 2045. The structure is 100 ft (30.5 m) long and 16 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

Location

Open in Google Maps
CarriesRoad
CrossesNorth Fork Siuslaw River
LocationNo Data Entered
RouteFederal Lands Road 58540
CountyLane County
StateOregon
Coordinates44.09556, -123.95139
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating26 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length100 ft (30.5 m)
Longest span60 ft (18.3 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (1996)
Projected traffic7 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 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 North Fork Siuslaw River built?

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

What condition is Road over North Fork 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 June 2024.

How much traffic does Road over North Fork Siuslaw River carry?

About 5 vehicles per day (1996 count).

How long is Road over North Fork Siuslaw River?

The structure is 100 ft (30.5 m) long with a longest span of 60 ft (18.3 m) and a deck 16 ft wide.

Who owns Road over North Fork Siuslaw River?

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