US Bridges

S.H. 6 over I-40 under

Good

Beckham County, Oklahoma · I-40 & S.H. 6 JCT · Structure no. 319950000000000

Built
2020
5 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
284 ft
4 main spans
Daily traffic
1,580
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 6 over I-40 under is a steel stringer/multi-beam or girder carrying S.H. 6 over I-40 under in Beckham County, Oklahoma. It was built in 2020, so it is 5 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,580 vehicles a day, roughly 15% of them trucks, projected to reach 2,220 by 2042. The structure is 284 ft (86.5 m) long and 71 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesS.H. 6
CrossesI-40 under
LocationI-40 & S.H. 6 JCT
RouteState Highway 6
CountyBeckham County
StateOklahoma
Coordinates35.38889, -99.40222
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length284 ft (86.5 m)
Longest span92 ft (28 m)
Deck width71 ft (21.6 m)
Roadway width57 ft (17.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,580 (2022)
Projected traffic2,220 by 2042
Trucks15%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S.H. 6 over I-40 under built?

It was built in 2020, making it 5 years old in 2025.

What condition is S.H. 6 over I-40 under 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 March 2023.

How much traffic does S.H. 6 over I-40 under carry?

About 1,580 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 6 over I-40 under?

The structure is 284 ft (86.5 m) long with a longest span of 92 ft (28 m) and a deck 71 ft wide.

Who owns S.H. 6 over I-40 under?

It is owned by the State Highway Agency.