US Bridges

14 S 06 W 34.01: over South Fork Alsea River

Good

Benton County, Oregon · 0.9 Miles S of HWY 34 (mp · Structure no. 0000000L1439344

Built
1966
59 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
90 ft
3 main spans
Daily traffic
150
2024 count
Owner
Federal
Bureau of Land Management

About this bridge

14 S 06 W 34.01: over South Fork Alsea River is a concrete continuous stringer/multi-beam or girder carrying 14 S 06 W 34.01: over South Fork Alsea River in Benton County, Oregon. It was built in 1966, so it is 59 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 150 vehicles a day, roughly 10% of them trucks, projected to reach 225 by 2044. The structure is 90 ft (27.4 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Carries14 S 06 W 34.01:
CrossesSouth Fork Alsea River
Location0.9 Miles S of HWY 34 (mp
RouteFederal Lands Road 0
StateOregon
Coordinates44.33889, -123.52194
Functional classRural Minor Collector

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 protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.1 US tons
Inventory rating23.9 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span56 ft (17.1 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic225 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-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$1,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 14 S 06 W 34.01: over South Fork Alsea River built?

It was built in 1966, making it 59 years old in 2025.

What condition is 14 S 06 W 34.01: over South Fork 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 March 2024.

How much traffic does 14 S 06 W 34.01: over South Fork Alsea River carry?

About 150 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 14 S 06 W 34.01: over South Fork Alsea River?

The structure is 90 ft (27.4 m) long with a longest span of 56 ft (17.1 m) and a deck 29 ft wide.

Who owns 14 S 06 W 34.01: over South Fork Alsea River?

It is owned by the Bureau of Land Management.