US Bridges

I-84 (hwy 006) WB over Powder River

Fair

Baker County, Oregon · 030 MI SE Union CO Line · Structure no. 09801 006 28917

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
117 ft
1 main span
Daily traffic
6,205
2022 count
Owner
State
State Highway Agency

About this bridge

I-84 (hwy 006) WB over Powder River is a prestressed concrete stringer/multi-beam or girder carrying I-84 (hwy 006) WB over Powder River in Baker 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 6,205 vehicles a day, roughly 36% of them trucks, projected to reach 7,000 by 2042. The structure is 117 ft (35.8 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-84 (hwy 006) WB
CrossesPowder River
Location030 MI SE Union CO Line
RouteInterstate 84
CountyBaker County
StateOregon
Coordinates44.9823, -117.89034
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.7 US tons
Inventory rating16.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length117 ft (35.8 m)
Longest span115 ft (35.1 m)
Deck width44 ft (13.5 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,205 (2022)
Projected traffic7,000 by 2042
Trucks36%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$605,000
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1972, making it 53 years old in 2025.

What condition is I-84 (hwy 006) WB over Powder 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 April 2024.

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

About 6,205 vehicles per day (2022 count), of which roughly 36% are trucks.

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

The structure is 117 ft (35.8 m) long with a longest span of 115 ft (35.1 m) and a deck 44 ft wide.

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

It is owned by the State Highway Agency.