US Bridges

Kochsmeier C-509 over Willow Creek

FairPosted for load

Malheur County, Oregon · 002 MI N Ints HWY 26 · Structure no. 45C101050900151

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
307
2020 count
Owner
County
County Highway Agency

About this bridge

Kochsmeier C-509 over Willow Creek is a steel stringer/multi-beam or girder carrying Kochsmeier C-509 over Willow Creek in Malheur County, Oregon. It was built in 1981, so it is 44 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. Its operating status is: posted for load restriction.

It carries about 307 vehicles a day, roughly 10% of them trucks, projected to reach 355 by 2025. The structure is 33 ft (10.1 m) long and 24 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesKochsmeier C-509
CrossesWillow Creek
Location002 MI N Ints HWY 26
RouteCounty Highway C0509
CountyMalheur County
StateOregon
Coordinates44.01087, -117.24574
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 12 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating18.5 US tons
Inventory rating14.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic307 (2020)
Projected traffic355 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Kochsmeier C-509 over Willow Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Kochsmeier C-509 over Willow Creek 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 2024.

How much traffic does Kochsmeier C-509 over Willow Creek carry?

About 307 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Kochsmeier C-509 over Willow Creek?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m) and a deck 24 ft wide.

Who owns Kochsmeier C-509 over Willow Creek?

It is owned by the County Highway Agency.