US Bridges

N3140 (1054C) over Walnut Bayou

Good

Carter County, Oklahoma · .8E 2.7N JCT US70/US70A · Structure no. 318660000000000

Built
2021
4 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
270
2022 count
Owner
County
County Highway Agency

About this bridge

N3140 (1054C) over Walnut Bayou is a prestressed concrete stringer/multi-beam or girder carrying N3140 (1054C) over Walnut Bayou in Carter County, Oklahoma. It was built in 2021, so it is 4 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 270 vehicles a day, roughly 15% of them trucks, projected to reach 432 by 2042. The structure is 70 ft (21.3 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesN3140 (1054C)
CrossesWalnut Bayou
Location.8E 2.7N JCT US70/US70A
RouteCounty Highway N3140
CountyCarter County
StateOklahoma
Coordinates34.20893, -97.40476
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.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span70 ft (21.3 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic270 (2022)
Projected traffic432 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N3140 (1054C) over Walnut Bayou built?

It was built in 2021, making it 4 years old in 2025.

What condition is N3140 (1054C) over Walnut Bayou 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 March 2023.

How much traffic does N3140 (1054C) over Walnut Bayou carry?

About 270 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N3140 (1054C) over Walnut Bayou?

The structure is 70 ft (21.3 m) long with a longest span of 70 ft (21.3 m) and a deck 28 ft wide.

Who owns N3140 (1054C) over Walnut Bayou?

It is owned by the County Highway Agency.