US Bridges

U.S. 75 over 6th St. under

Good

Tulsa County, Oklahoma · 0.6 MI N SH 51 · Structure no. 182820000000000

Built
1972
53 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
135 ft
3 main spans
Daily traffic
46,000
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 75 over 6th St. under is a steel stringer/multi-beam or girder carrying U.S. 75 over 6th St. under in Tulsa County, Oklahoma. It was built in 1972, so it is 53 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 46,000 vehicles a day, roughly 12% of them trucks, projected to reach 73,600 by 2042. The structure is 135 ft (41.3 m) long and 142 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesU.S. 75
Crosses6th St. under
Location0.6 MI N SH 51
RouteInterstate 444
CountyTulsa County
StateOklahoma
Coordinates36.15256, -95.98008
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.
Superstructure9 ExcellentNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.1 US tons
Inventory rating39.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length135 ft (41.3 m)
Longest span69 ft (20.9 m)
Deck width142 ft (43.3 m)
Roadway width65 ft (19.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46,000 (2022)
Projected traffic73,600 by 2042
Trucks12%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 U.S. 75 over 6th St. under built?

It was built in 1972, making it 53 years old in 2025.

What condition is U.S. 75 over 6th 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 June 2023.

How much traffic does U.S. 75 over 6th St. under carry?

About 46,000 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is U.S. 75 over 6th St. under?

The structure is 135 ft (41.3 m) long with a longest span of 69 ft (20.9 m) and a deck 142 ft wide.

Who owns U.S. 75 over 6th St. under?

It is owned by the State Highway Agency.