US Bridges

U.S. 75 NB over Flat Rock Creek

Fair

Tulsa County, Oklahoma · 5.2 MI N I-244 · Structure no. 183210000000000

Built
1972
53 years old, rebuilt 1988
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
200 ft
4 main spans
Daily traffic
18,300
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 75 NB over Flat Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying U.S. 75 NB over Flat Rock Creek in Tulsa County, Oklahoma. It was built in 1972 and reconstructed in 1988, 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 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 18,300 vehicles a day, roughly 8% of them trucks, projected to reach 29,280 by 2042. The structure is 200 ft (61 m) long and 50 ft wide.

Location

Open in Google Maps
CarriesU.S. 75 NB
CrossesFlat Rock Creek
Location5.2 MI N I-244
RouteU.S. Route 75
CountyTulsa County
StateOklahoma
Coordinates36.22498, -95.94497
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length200 ft (61 m)
Longest span50 ft (15.2 m)
Deck width50 ft (15.1 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,300 (2022)
Projected traffic29,280 by 2042
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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$3.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was U.S. 75 NB over Flat Rock Creek built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 1988.

What condition is U.S. 75 NB over Flat Rock Creek 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 U.S. 75 NB over Flat Rock Creek carry?

About 18,300 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is U.S. 75 NB over Flat Rock Creek?

The structure is 200 ft (61 m) long with a longest span of 50 ft (15.2 m) and a deck 50 ft wide.

Who owns U.S. 75 NB over Flat Rock Creek?

It is owned by the State Highway Agency.