US Bridges

IRR N2780 over Cooper Creek

Good

Kingfisher County, Oklahoma · 4E 1S of Loyal · Structure no. 316870000000000

Built
2016
9 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
77 ft
1 main span
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

IRR N2780 over Cooper Creek is a steel stringer/multi-beam or girder carrying IRR N2780 over Cooper Creek in Kingfisher County, Oklahoma. It was built in 2016, so it is 9 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 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 80 by 2042. The structure is 77 ft (23.5 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIRR N2780
CrossesCooper Creek
Location4E 1S of Loyal
RouteCounty Highway N2780
Coordinates35.95658, -98.05022
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.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96 US tons
Inventory rating57 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span77 ft (23.5 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic80 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 IRR N2780 over Cooper Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is IRR N2780 over Cooper 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 November 2024.

How much traffic does IRR N2780 over Cooper Creek carry?

About 50 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is IRR N2780 over Cooper Creek?

The structure is 77 ft (23.5 m) long with a longest span of 77 ft (23.5 m) and a deck 30 ft wide.

Who owns IRR N2780 over Cooper Creek?

It is owned by the County Highway Agency.