US Bridges

I-84 (hwy 006) WB over Grande Ronde River

Fair

Union County, Oregon · 14.9 MI SE Umatilla CO LN · Structure no. 19683 006 25889

Built
2004
21 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
375 ft
2 main spans
Daily traffic
5,882
2022 count
Owner
State
State Highway Agency

About this bridge

I-84 (hwy 006) WB over Grande Ronde River is a prestressed concrete continuous stringer/multi-beam or girder carrying I-84 (hwy 006) WB over Grande Ronde River in Union County, Oregon. It was built in 2004, so it is 21 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 5,882 vehicles a day, roughly 38% of them trucks, projected to reach 8,550 by 2042. The structure is 375 ft (114.3 m) long and 44 ft wide. If it were closed, the detour would be 42.9 mi (69 km).

Location

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CarriesI-84 (hwy 006) WB
CrossesGrande Ronde River
Location14.9 MI SE Umatilla CO LN
RouteInterstate 84
CountyUnion County
StateOregon
Coordinates45.3462, -118.1253
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHL 93
Structure length375 ft (114.3 m)
Longest span147 ft (44.8 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,882 (2022)
Projected traffic8,550 by 2042
Trucks38%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.9 mi (69 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-84 (hwy 006) WB over Grande Ronde River built?

It was built in 2004, making it 21 years old in 2025.

What condition is I-84 (hwy 006) WB over Grande Ronde 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 May 2024.

How much traffic does I-84 (hwy 006) WB over Grande Ronde River carry?

About 5,882 vehicles per day (2022 count), of which roughly 38% are trucks.

How long is I-84 (hwy 006) WB over Grande Ronde River?

The structure is 375 ft (114.3 m) long with a longest span of 147 ft (44.8 m) and a deck 44 ft wide.

Who owns I-84 (hwy 006) WB over Grande Ronde River?

It is owned by the State Highway Agency.