US Bridges

Lafayette HWY over Yamhill River

Fair

Yamhill County, Oregon · 0.2 MI S Lafayette · Structure no. 20351 018 00025

Built
2008
17 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
405 ft
3 main spans
Daily traffic
4,027
2020 count
Owner
County
County Highway Agency

About this bridge

Lafayette HWY over Yamhill River is a prestressed concrete continuous stringer/multi-beam or girder carrying Lafayette HWY over Yamhill River in Yamhill County, Oregon. It was built in 2008, so it is 17 years old, younger 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 4,027 vehicles a day, roughly 10% of them trucks, projected to reach 4,527 by 2025. The structure is 405 ft (123.4 m) long and 39 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesLafayette HWY
CrossesYamhill River
Location0.2 MI S Lafayette
RouteCounty Highway A0700
CountyYamhill County
StateOregon
Coordinates45.23904, -123.11389
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.3 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length405 ft (123.4 m)
Longest span165 ft (50.3 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,027 (2020)
Projected traffic4,527 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lafayette HWY over Yamhill River built?

It was built in 2008, making it 17 years old in 2025.

What condition is Lafayette HWY 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 Lafayette HWY over Yamhill River carry?

About 4,027 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Lafayette HWY over Yamhill River?

The structure is 405 ft (123.4 m) long with a longest span of 165 ft (50.3 m) and a deck 39 ft wide.

Who owns Lafayette HWY over Yamhill River?

It is owned by the County Highway Agency.