US Bridges

HWY 350 over Little Sheep Creek

FairPosted for load

Wallowa County, Oregon · 16.1 Mi. NE Jct. or 82 · Structure no. 02084 350 01605

Built
1935
90 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
24 ft
1 main span
Daily traffic
185
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 350 over Little Sheep Creek is a concrete tee beam carrying HWY 350 over Little Sheep Creek in Wallowa County, Oregon. It was built in 1935, so it is 90 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. Its operating status is: posted for other load-capacity restriction.

It carries about 185 vehicles a day, roughly 37% of them trucks, projected to reach 200 by 2042. The structure is 24 ft (7.3 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesHWY 350
CrossesLittle Sheep Creek
Location16.1 Mi. NE Jct. or 82
RouteState Highway 350
StateOregon
Coordinates45.4355, -117.0069
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic185 (2022)
Projected traffic200 by 2042
Trucks37%
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

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 350 over Little Sheep Creek built?

It was built in 1935, making it 90 years old in 2025.

What condition is HWY 350 over Little Sheep 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 July 2024.

How much traffic does HWY 350 over Little Sheep Creek carry?

About 185 vehicles per day (2022 count), of which roughly 37% are trucks.

How long is HWY 350 over Little Sheep Creek?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 27 ft wide.

Who owns HWY 350 over Little Sheep Creek?

It is owned by the State Highway Agency.