US Bridges

U.S. 75 SB over Flat Rock Creek

Fair

Tulsa County, Oklahoma · 5.2 MI N of I-244 · Structure no. 223800000000000

Built
1989
36 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
203 ft
2 main spans
Daily traffic
19,450
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 75 SB over Flat Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying U.S. 75 SB over Flat Rock Creek in Tulsa County, Oklahoma. It was built in 1989, so it is 36 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 19,450 vehicles a day, roughly 8% of them trucks, projected to reach 31,120 by 2042. The structure is 203 ft (61.9 m) long and 41 ft wide.

Location

Open in Google Maps
CarriesU.S. 75 SB
CrossesFlat Rock Creek
Location5.2 MI N of I-244
RouteU.S. Route 75
CountyTulsa County
StateOklahoma
Coordinates36.22487, -95.94534
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length203 ft (61.9 m)
Longest span100 ft (30.5 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,450 (2022)
Projected traffic31,120 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$3.3 million
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1989, making it 36 years old in 2025.

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

About 19,450 vehicles per day (2022 count), of which roughly 8% are trucks.

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

The structure is 203 ft (61.9 m) long with a longest span of 100 ft (30.5 m) and a deck 41 ft wide.

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

It is owned by the State Highway Agency.