US Bridges

I-40 over Air Depot under

Fair

Oklahoma County, Oklahoma · 4.4 MI E of JCT I35 · Structure no. 155530000000000

Built
1962
63 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
188 ft
4 main spans
Daily traffic
56,000
2022 count
Owner
State
State Highway Agency

About this bridge

I-40 over Air Depot under is a concrete continuous slab carrying I-40 over Air Depot under in Oklahoma County, Oklahoma. It was built in 1962, so it is 63 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 56,000 vehicles a day, roughly 12% of them trucks, projected to reach 89,600 by 2042. The structure is 188 ft (57.3 m) long and 118 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI-40
CrossesAir Depot under
Location4.4 MI E of JCT I35
RouteInterstate 40
CountyOklahoma County
StateOklahoma
Coordinates35.43412, -97.40631
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.7 US tons
Inventory rating22.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length188 ft (57.3 m)
Longest span57 ft (17.4 m)
Deck width118 ft (36 m)
Roadway width112 ft (34.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56,000 (2022)
Projected traffic89,600 by 2042
Trucks12%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
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$4.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-40 over Air Depot under built?

It was built in 1962, making it 63 years old in 2025.

What condition is I-40 over Air Depot 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 October 2024.

How much traffic does I-40 over Air Depot under carry?

About 56,000 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is I-40 over Air Depot under?

The structure is 188 ft (57.3 m) long with a longest span of 57 ft (17.4 m) and a deck 118 ft wide.

Who owns I-40 over Air Depot under?

It is owned by the State Highway Agency.