US Bridges

NE 9th Ave. C-742 over Willow CR

Fair

Malheur County, Oregon · 016MI East of Johnday HWY · Structure no. 15690A074200150

Built
1986
39 years old
Condition
Fair
inspected September 2023
Type
Slab
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
46
2020 count
Owner
County
County Highway Agency

About this bridge

NE 9th Ave. C-742 over Willow CR is a prestressed concrete slab carrying NE 9th Ave. C-742 over Willow CR in Malheur County, Oregon. It was built in 1986, so it is 39 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 46 vehicles a day, roughly 20% of them trucks, projected to reach 53 by 2025. The structure is 59 ft (18 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesNE 9th Ave. C-742
CrossesWillow CR
Location016MI East of Johnday HWY
RouteCounty Highway C0742
CountyMalheur County
StateOregon
Coordinates44.11241, -117.33179
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
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 rating42.5 US tons
Inventory rating32.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length59 ft (18 m)
Longest span58 ft (17.7 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46 (2020)
Projected traffic53 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 NE 9th Ave. C-742 over Willow CR built?

It was built in 1986, making it 39 years old in 2025.

What condition is NE 9th Ave. C-742 over Willow CR 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 September 2023.

How much traffic does NE 9th Ave. C-742 over Willow CR carry?

About 46 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is NE 9th Ave. C-742 over Willow CR?

The structure is 59 ft (18 m) long with a longest span of 58 ft (17.7 m) and a deck 24 ft wide.

Who owns NE 9th Ave. C-742 over Willow CR?

It is owned by the County Highway Agency.