US Bridges

U.S. 81 over Little Washita Riv Oflo

Good

Grady County, Oklahoma · 18.6 MI N SH17 · Structure no. 137870000000000

Built
1957
68 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete
Length
42 ft
3 main spans
Daily traffic
6,500
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 81 over Little Washita Riv Oflo is a concrete culvert carrying U.S. 81 over Little Washita Riv Oflo in Grady County, Oklahoma. It was built in 1957, so it is 68 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 6,500 vehicles a day, roughly 25% of them trucks, projected to reach 10,400 by 2042. The structure is 42 ft (12.8 m) long and 108 ft wide. If it were closed, the detour would be 59 mi (95 km).

Location

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CarriesU.S. 81
CrossesLittle Washita Riv Oflo
Location18.6 MI N SH17
RouteU.S. Route 81
CountyGrady County
StateOklahoma
Coordinates34.94195, -97.95221
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.8 US tons
Inventory rating38.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span14 ft (4.3 m)
Deck width108 ft (32.9 m)
Roadway width108 ft (32.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,500 (2022)
Projected traffic10,400 by 2042
Trucks25%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed59 mi (95 km)
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$906,000
NavigationNo navigation control on waterway

Frequently asked questions

When was U.S. 81 over Little Washita Riv Oflo built?

It was built in 1957, making it 68 years old in 2025.

What condition is U.S. 81 over Little Washita Riv Oflo 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 U.S. 81 over Little Washita Riv Oflo carry?

About 6,500 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is U.S. 81 over Little Washita Riv Oflo?

The structure is 42 ft (12.8 m) long with a longest span of 14 ft (4.3 m) and a deck 108 ft wide.

Who owns U.S. 81 over Little Washita Riv Oflo?

It is owned by the State Highway Agency.