US Bridges

HWY 370 over N Unit Ochoco Main Canal

Fair

Crook County, Oregon · 039 MI E HWY 4 JCT · Structure no. 02770 370 00385

Built
1945
80 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete Continuous
Length
50 ft
2 main spans
Daily traffic
2,001
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 370 over N Unit Ochoco Main Canal is a concrete continuous tee beam carrying HWY 370 over N Unit Ochoco Main Canal in Crook County, Oregon. It was built in 1945, so it is 80 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 2,001 vehicles a day, roughly 24% of them trucks, projected to reach 2,900 by 2042. The structure is 50 ft (15.2 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesHWY 370
CrossesN Unit Ochoco Main Canal
Location039 MI E HWY 4 JCT
RouteState Highway 370
CountyCrook County
StateOregon
Coordinates44.32718, -121.10772
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.4 US tons
Inventory rating19.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length50 ft (15.2 m)
Longest span24 ft (7.3 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,001 (2022)
Projected traffic2,900 by 2042
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 370 over N Unit Ochoco Main Canal built?

It was built in 1945, making it 80 years old in 2025.

What condition is HWY 370 over N Unit Ochoco Main 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 370 over N Unit Ochoco Main Canal carry?

About 2,001 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is HWY 370 over N Unit Ochoco Main Canal?

The structure is 50 ft (15.2 m) long with a longest span of 24 ft (7.3 m) and a deck 28 ft wide.

Who owns HWY 370 over N Unit Ochoco Main Canal?

It is owned by the State Highway Agency.