US Bridges

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

Fair

Union County, Oregon · 1.1 Mi. E. Jct. US 30 · Structure no. 09630 006 26031

Built
1972
53 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
302 ft
4 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 concrete continuous box beam or girders - multiple carrying I-84 (hwy 006) WB over Grande Ronde River in Union County, Oregon. It was built in 1972, so it is 53 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 5,882 vehicles a day, roughly 38% of them trucks, projected to reach 8,550 by 2042. The structure is 302 ft (92 m) long and 45 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesI-84 (hwy 006) WB
CrossesGrande Ronde River
Location1.1 Mi. E. Jct. US 30
RouteInterstate 84
CountyUnion County
StateOregon
Coordinates45.34253, -118.09871
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating37.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length302 ft (92 m)
Longest span80 ft (24.4 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deck19 ft (5.7 m)

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 closed5 mi (8 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 1972, making it 53 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 302 ft (92 m) long with a longest span of 80 ft (24.4 m) and a deck 45 ft wide.

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

It is owned by the State Highway Agency.