US Bridges

S.H. 56 over I-40 under

Fair

Seminole County, Oklahoma · JCT I-40/S.H. 56 · Structure no. 288080000000000

Built
2007
18 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
298 ft
4 main spans
Daily traffic
950
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 56 over I-40 under is a steel stringer/multi-beam or girder carrying S.H. 56 over I-40 under in Seminole County, Oklahoma. It was built in 2007, so it is 18 years old, younger 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 950 vehicles a day, roughly 15% of them trucks, projected to reach 1,520 by 2042. The structure is 298 ft (90.8 m) long and 42 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesS.H. 56
CrossesI-40 under
LocationJCT I-40/S.H. 56
RouteState Highway 56
CountySeminole County
StateOklahoma
Coordinates35.38584, -96.45894
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.4 US tons
Inventory rating37.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length298 ft (90.8 m)
Longest span100 ft (30.5 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2022)
Projected traffic1,520 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed39.8 mi (64 km)
TollOn a free road
National Highway SystemNo

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$5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was S.H. 56 over I-40 under built?

It was built in 2007, making it 18 years old in 2025.

What condition is S.H. 56 over I-40 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 February 2024.

How much traffic does S.H. 56 over I-40 under carry?

About 950 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 56 over I-40 under?

The structure is 298 ft (90.8 m) long with a longest span of 100 ft (30.5 m) and a deck 42 ft wide.

Who owns S.H. 56 over I-40 under?

It is owned by the State Highway Agency.