N3020 over Creek

Good

Grant County, Oklahoma · 2.6W .1N of US60/SH74 · Structure no. 271300000000000

Built: 2001; 24 years old
Condition: Good; inspected July 2024
Type: Culvert; Concrete
Length: 21 ft; 2 main spans
Daily traffic: 24; 2022 count
Owner: County; County Highway Agency

About this bridge

N3020 over Creek is a concrete culvert carrying N3020 over Creek in Grant County, Oklahoma. It was built in 2001, so it is 24 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 21 ft (6.4 m) long. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesN3020

CrossesCreek

Location2.6W .1N of US60/SH74

RouteCounty Highway N3020

CountyGrant County

StateOklahoma

Coordinates36.68049, -97.6244

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
Channel and channel protection	7 Good	Some minor problems.
Culvert	8 Very Good	No problems noted.

Last inspectionJuly 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation5: 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 rating36 US tons

Inventory rating21.1 US tons

Structure

Structure typeCulvert

MaterialConcrete

DeckNot applicable

Main spans2

Design loadHS 20

Structure length21 ft (6.4 m)

Longest span10 ft (3 m)

Deck width0 ft (0 m)

Roadway width0 ft (0 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 closed14.9 mi (24 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry

Estimated improvement cost$225,000

NavigationNo navigation control on waterway

Frequently asked questions

When was N3020 over Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is N3020 over 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 July 2024.

How much traffic does N3020 over Creek carry?

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

How long is N3020 over Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns N3020 over Creek?

It is owned by the County Highway Agency.