US Bridges

Or 201 (hwy 450) over Owyhee Irrigation Ditch

Fair

Malheur County, Oregon · 6.5 Mi. S. Jct. 20/26 · Structure no. 04394A450 00653

Built
1967
58 years old
Condition
Fair
inspected November 2023
Type
Slab
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
1,495
2022 count
Owner
State
State Highway Agency

About this bridge

Or 201 (hwy 450) over Owyhee Irrigation Ditch is a prestressed concrete slab carrying Or 201 (hwy 450) over Owyhee Irrigation Ditch in Malheur County, Oregon. It was built in 1967, so it is 58 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 1,495 vehicles a day, roughly 31% of them trucks, projected to reach 1,700 by 2042. The structure is 41 ft (12.5 m) long and 40 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesOr 201 (hwy 450)
CrossesOwyhee Irrigation Ditch
Location6.5 Mi. S. Jct. 20/26
RouteState Highway 201
CountyMalheur County
StateOregon
Coordinates43.816, -117.0556
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating29.3 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span40 ft (12.2 m)
Deck width40 ft (12.2 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,495 (2022)
Projected traffic1,700 by 2042
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 Or 201 (hwy 450) over Owyhee Irrigation Ditch built?

It was built in 1967, making it 58 years old in 2025.

What condition is Or 201 (hwy 450) over Owyhee Irrigation Ditch 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 November 2023.

How much traffic does Or 201 (hwy 450) over Owyhee Irrigation Ditch carry?

About 1,495 vehicles per day (2022 count), of which roughly 31% are trucks.

How long is Or 201 (hwy 450) over Owyhee Irrigation Ditch?

The structure is 41 ft (12.5 m) long with a longest span of 40 ft (12.2 m) and a deck 40 ft wide.

Who owns Or 201 (hwy 450) over Owyhee Irrigation Ditch?

It is owned by the State Highway Agency.