US Bridges

S.H. 74B over Buffalo Creek

Good

McClain County, Oklahoma · 2.4 Mi. E. Jct. SH76 · Structure no. 197760000000000

Built
1980
45 years old, rebuilt 2019
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
119 ft
3 main spans
Daily traffic
920
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 74B over Buffalo Creek is a steel stringer/multi-beam or girder carrying S.H. 74B over Buffalo Creek in McClain County, Oklahoma. It was built in 1980 and reconstructed in 2019, so it is 45 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 920 vehicles a day, roughly 15% of them trucks, projected to reach 1,472 by 2042. The structure is 119 ft (36.3 m) long and 33 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

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CarriesS.H. 74B
CrossesBuffalo Creek
Location2.4 Mi. E. Jct. SH76
RouteState Highway 74B
CountyMcClain County
StateOklahoma
Coordinates35.10236, -97.61163
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length119 ft (36.3 m)
Longest span43 ft (13.1 m)
Deck width33 ft (10.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic920 (2022)
Projected traffic1,472 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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$1.6 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 74B over Buffalo Creek built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 2019.

What condition is S.H. 74B over Buffalo Creek 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 July 2023.

How much traffic does S.H. 74B over Buffalo Creek carry?

About 920 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 74B over Buffalo Creek?

The structure is 119 ft (36.3 m) long with a longest span of 43 ft (13.1 m) and a deck 33 ft wide.

Who owns S.H. 74B over Buffalo Creek?

It is owned by the State Highway Agency.