US Bridges

Or 86 (hwy 12) over Powder River

Fair

Baker County, Oregon · 09.0 W of Richland Oregon · Structure no. 16810 012 03071

Built
1987
38 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
386 ft
3 main spans
Daily traffic
589
2022 count
Owner
State
State Highway Agency

About this bridge

Or 86 (hwy 12) over Powder River is a prestressed concrete stringer/multi-beam or girder carrying Or 86 (hwy 12) over Powder River in Baker County, Oregon. It was built in 1987, so it is 38 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 5 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 589 vehicles a day, roughly 26% of them trucks, projected to reach 600 by 2042. The structure is 386 ft (117.7 m) long and 39 ft wide.

Location

Open in Google Maps
CarriesOr 86 (hwy 12)
CrossesPowder River
Location09.0 W of Richland Oregon
RouteState Highway 86
CountyBaker County
StateOregon
Coordinates44.80644, -117.32252
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.3 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length386 ft (117.7 m)
Longest span135 ft (41.1 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic589 (2022)
Projected traffic600 by 2042
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Or 86 (hwy 12) over Powder River built?

It was built in 1987, making it 38 years old in 2025.

What condition is Or 86 (hwy 12) 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 July 2024.

How much traffic does Or 86 (hwy 12) over Powder River carry?

About 589 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is Or 86 (hwy 12) over Powder River?

The structure is 386 ft (117.7 m) long with a longest span of 135 ft (41.1 m) and a deck 39 ft wide.

Who owns Or 86 (hwy 12) over Powder River?

It is owned by the State Highway Agency.