US Bridges

S.H. 74B over Walnut Creek Oflow

Fair

McClain County, Oklahoma · 5.0 Mi. E. Jct. SH76 · Structure no. 240600000000000

Built
1995
30 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
42 ft
3 main spans
Daily traffic
1,100
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 74B over Walnut Creek Oflow is a concrete culvert carrying S.H. 74B over Walnut Creek Oflow in McClain County, Oklahoma. It was built in 1995, so it is 30 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 1,100 vehicles a day, roughly 15% of them trucks, projected to reach 1,760 by 2042. The structure is 42 ft (12.8 m) long and 25 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

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CarriesS.H. 74B
CrossesWalnut Creek Oflow
Location5.0 Mi. E. Jct. SH76
RouteState Highway 74B
CountyMcClain County
StateOklahoma
Coordinates35.10225, -97.56463
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 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 evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span10 ft (3 m)
Deck width25 ft (7.6 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2022)
Projected traffic1,760 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$747,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 74B over Walnut Creek Oflow built?

It was built in 1995, making it 30 years old in 2025.

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

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

About 1,100 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 74B over Walnut Creek Oflow?

The structure is 42 ft (12.8 m) long with a longest span of 10 ft (3 m) and a deck 25 ft wide.

Who owns S.H. 74B over Walnut Creek Oflow?

It is owned by the State Highway Agency.