US Bridges

I-44 EB over 21st St. under

Good

Tulsa County, Oklahoma · 2.1 MI E JCT SH 51 · Structure no. 226380000000000

Built
1990
35 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
290 ft
3 main spans
Daily traffic
27,600
2022 count
Owner
State
State Highway Agency

About this bridge

I-44 EB over 21st St. under is a steel continuous stringer/multi-beam or girder carrying I-44 EB over 21st St. under in Tulsa County, Oklahoma. It was built in 1990, so it is 35 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 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 27,600 vehicles a day, roughly 12% of them trucks, projected to reach 44,160 by 2042. The structure is 290 ft (88.4 m) long and 68 ft wide.

Location

Open in Google Maps
CarriesI-44 EB
Crosses21st St. under
Location2.1 MI E JCT SH 51
RouteInterstate 44
CountyTulsa County
StateOklahoma
Coordinates36.13323, -95.86845
Functional classUrban 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum 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 rating77.3 US tons
Inventory rating46.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length290 ft (88.4 m)
Longest span134 ft (40.8 m)
Deck width68 ft (20.6 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,600 (2022)
Projected traffic44,160 by 2042
Trucks12%
Lanes on structure4
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$5.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-44 EB over 21st St. under built?

It was built in 1990, making it 35 years old in 2025.

What condition is I-44 EB over 21st St. 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 September 2024.

How much traffic does I-44 EB over 21st St. under carry?

About 27,600 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is I-44 EB over 21st St. under?

The structure is 290 ft (88.4 m) long with a longest span of 134 ft (40.8 m) and a deck 68 ft wide.

Who owns I-44 EB over 21st St. under?

It is owned by the State Highway Agency.