US Bridges

I-84 (hwy 006) EB over Alder CR RD

Fair

Baker County, Oregon · 112 MI SE JCT Ore 7 · Structure no. 08423E006 31529

Built
1964
61 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete Continuous
Length
144 ft
3 main spans
Daily traffic
5,881
2022 count
Owner
State
State Highway Agency

About this bridge

I-84 (hwy 006) EB over Alder CR RD is a concrete continuous tee beam carrying I-84 (hwy 006) EB over Alder CR RD in Baker County, Oregon. It was built in 1964, so it is 61 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 5,881 vehicles a day, roughly 45% of them trucks, projected to reach 6,950 by 2042. The structure is 144 ft (43.9 m) long and 42 ft wide. If it were closed, the detour would be 70.8 mi (114 km).

Location

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CarriesI-84 (hwy 006) EB
CrossesAlder CR RD
Location112 MI SE JCT Ore 7
RouteInterstate 84
CountyBaker County
StateOregon
Coordinates44.68269, -117.65951
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length144 ft (43.9 m)
Longest span55 ft (16.8 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,881 (2022)
Projected traffic6,950 by 2042
Trucks45%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed70.8 mi (114 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-84 (hwy 006) EB over Alder CR RD built?

It was built in 1964, making it 61 years old in 2025.

What condition is I-84 (hwy 006) EB over Alder CR RD 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 April 2024.

How much traffic does I-84 (hwy 006) EB over Alder CR RD carry?

About 5,881 vehicles per day (2022 count), of which roughly 45% are trucks.

How long is I-84 (hwy 006) EB over Alder CR RD?

The structure is 144 ft (43.9 m) long with a longest span of 55 ft (16.8 m) and a deck 42 ft wide.

Who owns I-84 (hwy 006) EB over Alder CR RD?

It is owned by the State Highway Agency.