US Bridges

County Road over Or 18 (hwy 39)

Fair

Yamhill County, Oregon · 029 MI E Polk Yam CO LN · Structure no. 08062 039 03260

Built
1957
68 years old
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete Continuous
Length
268 ft
4 main spans
Daily traffic
9,611
2022 count
Owner
State
State Highway Agency

About this bridge

County Road over Or 18 (hwy 39) is a concrete continuous tee beam carrying County Road over Or 18 (hwy 39) in Yamhill County, Oregon. It was built in 1957, so it is 68 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 9,611 vehicles a day, roughly 9% of them trucks, projected to reach 9,700 by 2042. The structure is 268 ft (81.7 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCounty Road
CrossesOr 18 (hwy 39)
Location029 MI E Polk Yam CO LN
RouteCounty Highway 0
CountyYamhill County
StateOregon
Coordinates45.08973, -123.3955
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating23.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length268 ft (81.7 m)
Longest span85 ft (25.9 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,611 (2022)
Projected traffic9,700 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 SystemNo

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 County Road over Or 18 (hwy 39) built?

It was built in 1957, making it 68 years old in 2025.

What condition is County Road over Or 18 (hwy 39) 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 County Road over Or 18 (hwy 39) carry?

About 9,611 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is County Road over Or 18 (hwy 39)?

The structure is 268 ft (81.7 m) long with a longest span of 85 ft (25.9 m) and a deck 31 ft wide.

Who owns County Road over Or 18 (hwy 39)?

It is owned by the State Highway Agency.