N2760 over Unamed Creek

Good

Grant County, Oklahoma · 3W 4.S of Manchester · Structure no. 326380000000000

Built: 2022; 3 years old
Condition: Good; inspected September 2024
Type: Slab; Concrete
Length: 40 ft; 1 main span
Daily traffic: 24; 2022 count
Owner: County; County Highway Agency

About this bridge

N2760 over Unamed Creek is a concrete slab carrying N2760 over Unamed Creek in Grant County, Oklahoma. It was built in 2022, so it is 3 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 24 vehicles a day, roughly 10% of them trucks, projected to reach 38 by 2042. The structure is 40 ft (12.2 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesN2760

CrossesUnamed Creek

Location3W 4.S of Manchester

RouteCounty Highway N2760

CountyGrant County

StateOklahoma

Coordinates36.93826, -98.09172

Functional classRural Local

Condition and inspection

Good

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

Component	Rating	Meaning
Deck	8 Very Good	No problems noted.
Superstructure	8 Very Good	No problems noted.
Substructure	8 Very Good	No problems noted.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionSeptember 2024

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 adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating97 US tons

Inventory rating50 US tons

Structure

Structure typeSlab

MaterialConcrete

DeckConcrete, cast-in-place

Main spans1

Design loadH 20

Structure length40 ft (12.2 m)

Longest span40 ft (12.2 m)

Deck width27 ft (8.2 m)

Roadway width26 ft (7.9 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24 (2022)

Projected traffic38 by 2042

Trucks10%

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 N2760 over Unamed Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is N2760 over Unamed 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 September 2024.

How much traffic does N2760 over Unamed Creek carry?

About 24 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N2760 over Unamed Creek?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 27 ft wide.

Who owns N2760 over Unamed Creek?

It is owned by the County Highway Agency.