US Bridges

Road over Alsea River

Good

Lincoln County, Oregon · No Data Entered · Structure no. 061203000001187

Built
1959
66 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
180 ft
2 main spans
Daily traffic
6
1996 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Alsea River is a prestressed concrete stringer/multi-beam or girder carrying Road over Alsea River in Lincoln 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6 vehicles a day, projected to reach 9 by 2045. The structure is 180 ft (54.9 m) long and 17 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesRoad
CrossesAlsea River
LocationNo Data Entered
RouteFederal Lands Road 34150
StateOregon
Coordinates44.37583, -123.7525
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.1 US tons
Inventory rating33.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length180 ft (54.9 m)
Longest span87 ft (26.6 m)
Deck width17 ft (5.2 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6 (1996)
Projected traffic9 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 Alsea River built?

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

What condition is Road over Alsea River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does Road over Alsea River carry?

About 6 vehicles per day (1996 count).

How long is Road over Alsea River?

The structure is 180 ft (54.9 m) long with a longest span of 87 ft (26.6 m) and a deck 17 ft wide.

Who owns Road over Alsea River?

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