US Bridges

Dejong Rd. over Yamhill River

Fair

Yamhill County, Oregon · 2 MI S Bellevue · Structure no. 11780A025 00094

Built
1960
65 years old, rebuilt 2018
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
744 ft
3 main spans
Daily traffic
742
2020 count
Owner
County
County Highway Agency

About this bridge

Dejong Rd. over Yamhill River is a concrete continuous box beam or girders - multiple carrying Dejong Rd. over Yamhill River in Yamhill County, Oregon. It was built in 1960 and reconstructed in 2018, 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 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 742 vehicles a day, roughly 20% of them trucks, projected to reach 832 by 2025. The structure is 744 ft (226.8 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesDejong Rd.
CrossesYamhill River
Location2 MI S Bellevue
RouteCounty Highway A0548
CountyYamhill County
StateOregon
Coordinates45.09003, -123.3217
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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 alignment6: Equal to present minimum criteria
Operating rating29.3 US tons
Inventory rating22.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+8 approach)
Design loadHS 20
Structure length744 ft (226.8 m)
Longest span100 ft (30.5 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic742 (2020)
Projected traffic832 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Dejong Rd. over Yamhill River built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2018.

What condition is Dejong Rd. over Yamhill 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 September 2024.

How much traffic does Dejong Rd. over Yamhill River carry?

About 742 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Dejong Rd. over Yamhill River?

The structure is 744 ft (226.8 m) long with a longest span of 100 ft (30.5 m) and a deck 29 ft wide.

Who owns Dejong Rd. over Yamhill River?

It is owned by the County Highway Agency.