US Bridges

U.S. 81 SB over N. Canadian River

Good

Canadian County, Oklahoma · 2.2 N. Jct. S.H.66 · Structure no. 262370000000000

Built
2000
25 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
602 ft
6 main spans
Daily traffic
2,550
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 81 SB over N. Canadian River is a prestressed concrete stringer/multi-beam or girder carrying U.S. 81 SB over N. Canadian River in Canadian County, Oklahoma. It was built in 2000, so it is 25 years old, younger 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 2,550 vehicles a day, roughly 15% of them trucks, projected to reach 4,080 by 2042. The structure is 602 ft (183.5 m) long and 41 ft wide.

CarriesU.S. 81 SB
CrossesN. Canadian River
Location2.2 N. Jct. S.H.66
RouteU.S. Route 81
Coordinates35.56188, -97.95715
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating39 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length602 ft (183.5 m)
Longest span101 ft (30.8 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,550 (2022)
Projected traffic4,080 by 2042
Trucks15%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

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$9.9 million
NavigationNo navigation control on waterway

Frequently asked questions

When was U.S. 81 SB over N. Canadian River built?

It was built in 2000, making it 25 years old in 2025.

What condition is U.S. 81 SB over N. Canadian River 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 November 2024.

How much traffic does U.S. 81 SB over N. Canadian River carry?

About 2,550 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is U.S. 81 SB over N. Canadian River?

The structure is 602 ft (183.5 m) long with a longest span of 101 ft (30.8 m) and a deck 41 ft wide.

Who owns U.S. 81 SB over N. Canadian River?

It is owned by the State Highway Agency.