US Bridges

I-40 WB over Six Mile Creek

Fair

Canadian County, Oklahoma · 22.3 Mi. E. Caddo CO · Structure no. 167400000000000

Built
1966
59 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
3 main spans
Daily traffic
18,800
2022 count
Owner
State
State Highway Agency

About this bridge

I-40 WB over Six Mile Creek is a steel stringer/multi-beam or girder carrying I-40 WB over Six Mile Creek in Canadian County, Oklahoma. It was built in 1966, so it is 59 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 18,800 vehicles a day, roughly 43% of them trucks, projected to reach 30,080 by 2042. The structure is 120 ft (36.6 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesI-40 WB
CrossesSix Mile Creek
Location22.3 Mi. E. Caddo CO
RouteInterstate 40
CountyCanadian County
StateOklahoma
Coordinates35.50138, -97.92523
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating64 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span40 ft (12.2 m)
Deck width40 ft (12.3 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,800 (2022)
Projected traffic30,080 by 2042
Trucks43%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$1.6 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I-40 WB over Six Mile Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is I-40 WB over Six Mile 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 April 2023.

How much traffic does I-40 WB over Six Mile Creek carry?

About 18,800 vehicles per day (2022 count), of which roughly 43% are trucks.

How long is I-40 WB over Six Mile Creek?

The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 40 ft wide.

Who owns I-40 WB over Six Mile Creek?

It is owned by the State Highway Agency.