US Bridges

Or 74 (hwy 052) over Blackhorse Creek

Fair

Morrow County, Oregon · In Lexington · Structure no. 00611 052 03652

Built
1921
104 years old, rebuilt 1963
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
32 ft
1 main span
Daily traffic
1,546
2022 count
Owner
State
State Highway Agency

About this bridge

Or 74 (hwy 052) over Blackhorse Creek is a concrete stringer/multi-beam or girder carrying Or 74 (hwy 052) over Blackhorse Creek in Morrow County, Oregon. It was built in 1921 and reconstructed in 1963, so it is 104 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 1,546 vehicles a day, roughly 21% of them trucks, projected to reach 1,700 by 2042. The structure is 32 ft (9.8 m) long and 38 ft wide. If it were closed, the detour would be 22.4 mi (36 km).

Location

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CarriesOr 74 (hwy 052)
CrossesBlackhorse Creek
LocationIn Lexington
RouteState Highway 74
CountyMorrow County
StateOregon
Coordinates45.44583, -119.68557
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
Deck9 ExcellentNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width38 ft (11.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,546 (2022)
Projected traffic1,700 by 2042
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed22.4 mi (36 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 Or 74 (hwy 052) over Blackhorse Creek built?

It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1963.

What condition is Or 74 (hwy 052) over Blackhorse 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 February 2024.

How much traffic does Or 74 (hwy 052) over Blackhorse Creek carry?

About 1,546 vehicles per day (2022 count), of which roughly 21% are trucks.

How long is Or 74 (hwy 052) over Blackhorse Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 38 ft wide.

Who owns Or 74 (hwy 052) over Blackhorse Creek?

It is owned by the State Highway Agency.