US Bridges

I-40 WB over S.H. 34 South under

Good

Beckham County, Oklahoma · JCT I-40 & SH-34 · Structure no. 174620000000000

Built
1969
56 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
112 ft
3 main spans
Daily traffic
6,800
2022 count
Owner
State
State Highway Agency

About this bridge

I-40 WB over S.H. 34 South under is a steel continuous stringer/multi-beam or girder carrying I-40 WB over S.H. 34 South under in Beckham County, Oklahoma. It was built in 1969, so it is 56 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 6,800 vehicles a day, roughly 40% of them trucks, projected to reach 10,880 by 2042. The structure is 112 ft (34.1 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesI-40 WB
CrossesS.H. 34 South under
LocationJCT I-40 & SH-34
RouteInterstate 40
CountyBeckham County
StateOklahoma
Coordinates35.38583, -99.50567
Functional classRural Principal Arterial - Interstate

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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length112 ft (34.1 m)
Longest span47 ft (14.3 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,800 (2022)
Projected traffic10,880 by 2042
Trucks40%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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$1.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-40 WB over S.H. 34 South under built?

It was built in 1969, making it 56 years old in 2025.

What condition is I-40 WB over S.H. 34 South 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 I-40 WB over S.H. 34 South under carry?

About 6,800 vehicles per day (2022 count), of which roughly 40% are trucks.

How long is I-40 WB over S.H. 34 South under?

The structure is 112 ft (34.1 m) long with a longest span of 47 ft (14.3 m) and a deck 40 ft wide.

Who owns I-40 WB over S.H. 34 South under?

It is owned by the State Highway Agency.