US Bridges

US101 (hwy 9) over Salmon River

Fair

Lincoln County, Oregon · 005 MI N HWY 9 JCT · Structure no. 09463 009 10470

Built
1960
65 years old
Condition
Fair
inspected January 2023
Type
Tee Beam
Concrete Continuous
Length
170 ft
3 main spans
Daily traffic
4,217
2022 count
Owner
State
State Highway Agency

About this bridge

US101 (hwy 9) over Salmon River is a concrete continuous tee beam carrying US101 (hwy 9) over Salmon River in Lincoln County, Oregon. It was built in 1960, so it is 65 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 5 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 4,217 vehicles a day, roughly 16% of them trucks, projected to reach 5,100 by 2042. The structure is 170 ft (51.8 m) long and 35 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesUS101 (hwy 9)
CrossesSalmon River
Location005 MI N HWY 9 JCT
RouteU.S. Route 101
CountyLincoln County
StateOregon
Coordinates45.02427, -123.96762
Functional classRural Principal Arterial - Other

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating19 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length170 ft (51.8 m)
Longest span70 ft (21.3 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,217 (2022)
Projected traffic5,100 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed29.8 mi (48 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US101 (hwy 9) over Salmon River built?

It was built in 1960, making it 65 years old in 2025.

What condition is US101 (hwy 9) over Salmon 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 January 2023.

How much traffic does US101 (hwy 9) over Salmon River carry?

About 4,217 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is US101 (hwy 9) over Salmon River?

The structure is 170 ft (51.8 m) long with a longest span of 70 ft (21.3 m) and a deck 35 ft wide.

Who owns US101 (hwy 9) over Salmon River?

It is owned by the State Highway Agency.