US Bridges

U.S. 270 over N. Canadian River Oflow

Good

Blaine County, Oklahoma · 2.3 MI S JCT S.H. 33 · Structure no. 181380000000000

Built
1971
54 years old, rebuilt 2011
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
450 ft
9 main spans
Daily traffic
5,000
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 270 over N. Canadian River Oflow is a steel stringer/multi-beam or girder carrying U.S. 270 over N. Canadian River Oflow in Blaine County, Oklahoma. It was built in 1971 and reconstructed in 2011, so it is 54 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,000 vehicles a day, roughly 25% of them trucks, projected to reach 8,000 by 2042. The structure is 450 ft (137.2 m) long and 70 ft wide. If it were closed, the detour would be 70.2 mi (113 km).

Location

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CarriesU.S. 270
CrossesN. Canadian River Oflow
Location2.3 MI S JCT S.H. 33
RouteU.S. Route 270
CountyBlaine County
StateOklahoma
Coordinates35.81085, -98.42125
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length450 ft (137.2 m)
Longest span50 ft (15.2 m)
Deck width70 ft (21.3 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2022)
Projected traffic8,000 by 2042
Trucks25%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed70.2 mi (113 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$5.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was U.S. 270 over N. Canadian River Oflow built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2011.

What condition is U.S. 270 over N. Canadian River Oflow in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does U.S. 270 over N. Canadian River Oflow carry?

About 5,000 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is U.S. 270 over N. Canadian River Oflow?

The structure is 450 ft (137.2 m) long with a longest span of 50 ft (15.2 m) and a deck 70 ft wide.

Who owns U.S. 270 over N. Canadian River Oflow?

It is owned by the State Highway Agency.