US Bridges

Road over Alsea River

Fair

Lincoln County, Oregon · 0.01 MI from JCT HWY 34 · Structure no. 061203000001155

Built
1961
64 years old
Condition
Fair
inspected August 2023
Type
Frame
Concrete Continuous
Length
260 ft
5 main spans
Daily traffic
15
1996 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Alsea River is a concrete continuous frame carrying Road over Alsea River in Lincoln 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 15 vehicles a day, projected to reach 22 by 2045. The structure is 260 ft (79.2 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
CrossesAlsea River
Location0.01 MI from JCT HWY 34
RouteFederal Lands Road 34300
CountyLincoln County
StateOregon
Coordinates44.38667, -123.83083
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 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 rating39 US tons
Inventory rating25 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span80 ft (24.4 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (1996)
Projected traffic22 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 1961, making it 64 years old in 2025.

What condition is Road over Alsea 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 August 2023.

How much traffic does Road over Alsea River carry?

About 15 vehicles per day (1996 count).

How long is Road over Alsea River?

The structure is 260 ft (79.2 m) long with a longest span of 80 ft (24.4 m) and a deck 16 ft wide.

Who owns Road over Alsea River?

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