US Bridges

Owyhee Ave. C-570 over Owyhee Canal

GoodPosted for load

Malheur County, Oregon · 009MI Winter Succor CR Hy · Structure no. 015478057001696

Built
1938
87 years old
Condition
Good
inspected October 2023
Type
Tee Beam
Concrete Continuous
Length
58 ft
3 main spans
Daily traffic
734
2020 count
Owner
County
County Highway Agency

About this bridge

Owyhee Ave. C-570 over Owyhee Canal is a concrete continuous tee beam carrying Owyhee Ave. C-570 over Owyhee Canal in Malheur County, Oregon. It was built in 1938, so it is 87 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 734 vehicles a day, roughly 10% of them trucks, projected to reach 854 by 2025. The structure is 58 ft (17.7 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesOwyhee Ave. C-570
CrossesOwyhee Canal
Location009MI Winter Succor CR Hy
RouteCounty Highway 0B487
StateOregon
Coordinates43.79499, -117.07656
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.2 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span38 ft (11.6 m)
Deck width29 ft (8.8 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic734 (2020)
Projected traffic854 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Owyhee Ave. C-570 over Owyhee Canal built?

It was built in 1938, making it 87 years old in 2025.

What condition is Owyhee Ave. C-570 over Owyhee Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Owyhee Ave. C-570 over Owyhee Canal carry?

About 734 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Owyhee Ave. C-570 over Owyhee Canal?

The structure is 58 ft (17.7 m) long with a longest span of 38 ft (11.6 m) and a deck 29 ft wide.

Who owns Owyhee Ave. C-570 over Owyhee Canal?

It is owned by the County Highway Agency.