US Bridges

U.S. 81 NB over Six Mile Creek

Good

Canadian County, Oklahoma · 1.5S of I-40 · Structure no. 273120000000000

Built
2005
20 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
112 ft
3 main spans
Daily traffic
2,950
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 81 NB over Six Mile Creek is a prestressed concrete stringer/multi-beam or girder carrying U.S. 81 NB over Six Mile Creek in Canadian County, Oklahoma. It was built in 2005, so it is 20 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 2,950 vehicles a day, roughly 15% of them trucks, projected to reach 4,720 by 2042. The structure is 112 ft (34.2 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesU.S. 81 NB
CrossesSix Mile Creek
Location1.5S of I-40
RouteU.S. Route 81
CountyCanadian County
StateOklahoma
Coordinates35.47981, -97.93798
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.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length112 ft (34.2 m)
Longest span46 ft (14 m)
Deck width40 ft (12.3 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,950 (2022)
Projected traffic4,720 by 2042
Trucks15%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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$1.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was U.S. 81 NB over Six Mile Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is U.S. 81 NB over Six Mile Creek 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 May 2023.

How much traffic does U.S. 81 NB over Six Mile Creek carry?

About 2,950 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is U.S. 81 NB over Six Mile Creek?

The structure is 112 ft (34.2 m) long with a longest span of 46 ft (14 m) and a deck 40 ft wide.

Who owns U.S. 81 NB over Six Mile Creek?

It is owned by the State Highway Agency.