US Bridges

Road over North Fork Siuslaw River

Fair

Lane County, Oregon · No Data Entered · Structure no. 061202000001200

Built
1950
75 years old
Condition
Fair
inspected June 2024
Type
Frame
Concrete Continuous
Length
44 ft
1 main span
Daily traffic
20
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 1950, so it is 75 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, projected to reach 30 by 2045. The structure is 44 ft (13.5 m) long and 16 ft wide.

CarriesRoad
CrossesNorth Fork Siuslaw River
LocationNo Data Entered
RouteFederal Lands Road 25530
StateOregon
Coordinates44.12655, -123.91291
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 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43 US tons
Inventory rating26 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length44 ft (13.5 m)
Longest span42 ft (12.8 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (1996)
Projected traffic30 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 1950, making it 75 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 20 vehicles per day (1996 count).

How long is Road over North Fork Siuslaw River?

The structure is 44 ft (13.5 m) long with a longest span of 42 ft (12.8 m) and a deck 16 ft wide.

Who owns Road over North Fork Siuslaw River?

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