US Bridges

Or 18 (hwy 39) over HWY 30

Fair

Polk County, Oregon · 025 MI W Polk Yam CO LN · Structure no. 08321 039 02728

Built
1958
67 years old
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete Continuous
Length
258 ft
5 main spans
Daily traffic
8,172
2022 count
Owner
State
State Highway Agency

About this bridge

Or 18 (hwy 39) over HWY 30 is a concrete continuous tee beam carrying Or 18 (hwy 39) over HWY 30 in Polk County, Oregon. It was built in 1958, so it is 67 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 8,172 vehicles a day, roughly 9% of them trucks, projected to reach 8,700 by 2042. The structure is 258 ft (78.6 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesOr 18 (hwy 39)
CrossesHWY 30
Location025 MI W Polk Yam CO LN
RouteState Highway 18
StateOregon
Coordinates45.05549, -123.49152
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.
Substructure8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length258 ft (78.6 m)
Longest span80 ft (24.4 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,172 (2022)
Projected traffic8,700 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Or 18 (hwy 39) over HWY 30 built?

It was built in 1958, making it 67 years old in 2025.

What condition is Or 18 (hwy 39) over HWY 30 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 HWY 30 carry?

About 8,172 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Or 18 (hwy 39) over HWY 30?

The structure is 258 ft (78.6 m) long with a longest span of 80 ft (24.4 m) and a deck 35 ft wide.

Who owns Or 18 (hwy 39) over HWY 30?

It is owned by the State Highway Agency.