US Bridges

I-40 over 7th St. under

Fair

Beckham County, Oklahoma · 15.5 MI E I-40 Bus. · Structure no. 174580000000000

Built
1969
56 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
102 ft
3 main spans
Daily traffic
7,600
2022 count
Owner
State
State Highway Agency

About this bridge

I-40 over 7th St. under is a concrete continuous slab carrying I-40 over 7th St. 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 fair condition with a lowest component rating of 6 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 7,600 vehicles a day, roughly 40% of them trucks, projected to reach 12,160 by 2042. The structure is 102 ft (31.1 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesI-40
Crosses7th St. under
Location15.5 MI E I-40 Bus.
RouteInterstate 40
CountyBeckham County
StateOklahoma
Coordinates35.40808, -99.38297
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating22 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length102 ft (31.1 m)
Longest span40 ft (12.2 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,600 (2022)
Projected traffic12,160 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 over 7th St. under built?

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

What condition is I-40 over 7th St. under 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 March 2023.

How much traffic does I-40 over 7th St. under carry?

About 7,600 vehicles per day (2022 count), of which roughly 40% are trucks.

How long is I-40 over 7th St. under?

The structure is 102 ft (31.1 m) long with a longest span of 40 ft (12.2 m) and a deck 40 ft wide.

Who owns I-40 over 7th St. under?

It is owned by the State Highway Agency.