US Bridges

HWY 457 over Owyhee Canal

Fair

Malheur County, Oregon · 1.75 MI W. JCT I-84 · Structure no. 17192 006C37145

Built
1991
34 years old
Condition
Fair
inspected March 2023
Type
Slab
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
6
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 457 over Owyhee Canal is a prestressed concrete slab carrying HWY 457 over Owyhee Canal in Malheur County, Oregon. It was built in 1991, so it is 34 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 6 vehicles a day, roughly 50% of them trucks, projected to reach 30 by 2030. The structure is 56 ft (17.1 m) long and 36 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesHWY 457
CrossesOwyhee Canal
Location1.75 MI W. JCT I-84
CountyMalheur County
StateOregon
Coordinates44.0826, -117.04715
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating45.3 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length56 ft (17.1 m)
Longest span52 ft (15.8 m)
Deck width36 ft (11 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6 (2022)
Projected traffic30 by 2030
Trucks50%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 457 over Owyhee Canal built?

It was built in 1991, making it 34 years old in 2025.

What condition is HWY 457 over Owyhee Canal 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 March 2023.

How much traffic does HWY 457 over Owyhee Canal carry?

About 6 vehicles per day (2022 count), of which roughly 50% are trucks.

How long is HWY 457 over Owyhee Canal?

The structure is 56 ft (17.1 m) long with a longest span of 52 ft (15.8 m) and a deck 36 ft wide.

Who owns HWY 457 over Owyhee Canal?

It is owned by the State Highway Agency.