US Bridges

Or 18 (hwy 39) over Rogue River

FairPosted for load

Polk County, Oregon · 014 MI N Grande Ronde · Structure no. 04573 039 01878

Built
1942
83 years old
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete Continuous
Length
76 ft
3 main spans
Daily traffic
7,259
2022 count
Owner
State
State Highway Agency

About this bridge

Or 18 (hwy 39) over Rogue River is a concrete continuous tee beam carrying Or 18 (hwy 39) over Rogue River in Polk County, Oregon. It was built in 1942, so it is 83 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. Its operating status is: posted for other load-capacity restriction.

It carries about 7,259 vehicles a day, roughly 4% of them trucks, projected to reach 8,400 by 2042. The structure is 76 ft (23.2 m) long and 35 ft wide. If it were closed, the detour would be 13.7 mi (22 km).

CarriesOr 18 (hwy 39)
CrossesRogue River
Location014 MI N Grande Ronde
RouteState Highway 18
StateOregon
Coordinates45.06018, -123.65787
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
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 rating20.4 US tons
Inventory rating15.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length76 ft (23.2 m)
Longest span50 ft (15.2 m)
Deck width35 ft (10.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,259 (2022)
Projected traffic8,400 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 statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$389,000
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1942, making it 83 years old in 2025.

What condition is Or 18 (hwy 39) over Rogue 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 November 2024.

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

About 7,259 vehicles per day (2022 count), of which roughly 4% are trucks.

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

The structure is 76 ft (23.2 m) long with a longest span of 50 ft (15.2 m) and a deck 35 ft wide.

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

It is owned by the State Highway Agency.