US Bridges

Or 18 (hwy 39) over Salmon River

PoorPosted for load

Lincoln County, Oregon · 040 MI W Lincoln CO LN · Structure no. 04192 039 00623

Built
1930
95 years old
Condition
Poor
inspected November 2024
Type
Arch - Deck
Concrete
Length
155 ft
1 main span
Daily traffic
7,215
2022 count
Owner
State
State Highway Agency

About this bridge

Or 18 (hwy 39) over Salmon River is a concrete arch - deck carrying Or 18 (hwy 39) over Salmon River in Lincoln County, Oregon. It was built in 1930, so it is 95 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for other load-capacity restriction.

It carries about 7,215 vehicles a day, roughly 4% of them trucks, projected to reach 8,200 by 2042. The structure is 155 ft (47.2 m) long and 29 ft wide. If it were closed, the detour would be 13.7 mi (22 km).

CarriesOr 18 (hwy 39)
CrossesSalmon River
Location040 MI W Lincoln CO LN
RouteState Highway 18
StateOregon
Coordinates45.01911, -123.86686
Functional classRural Principal Arterial - Other

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.8 US tons
Inventory rating17.9 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+8 approach)
Design loadH 15
Structure length155 ft (47.2 m)
Longest span82 ft (25 m)
Deck width29 ft (8.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,215 (2022)
Projected traffic8,200 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed13.7 mi (22 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$793,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Or 18 (hwy 39) over Salmon River built?

It was built in 1930, making it 95 years old in 2025.

What condition is Or 18 (hwy 39) over Salmon River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does Or 18 (hwy 39) over Salmon River carry?

About 7,215 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Or 18 (hwy 39) over Salmon River?

The structure is 155 ft (47.2 m) long with a longest span of 82 ft (25 m) and a deck 29 ft wide.

Who owns Or 18 (hwy 39) over Salmon River?

It is owned by the State Highway Agency.