Co. Rd. over I-40 under

Good

Pottawatomie County, Oklahoma · 10.1 MI E Ok C/L · Structure no. 155400000000000

Built: 1962; 63 years old
Condition: Good; inspected June 2023
Type: Slab; Concrete Continuous
Length: 152 ft; 4 main spans
Daily traffic: 275; 2022 count
Owner: State; State Highway Agency

About this bridge

Co. Rd. over I-40 under is a concrete continuous slab carrying Co. Rd. over I-40 under in Pottawatomie County, Oklahoma. It was built in 1962, so it is 63 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 275 vehicles a day, roughly 18% of them trucks, projected to reach 440 by 2042. The structure is 152 ft (46.3 m) long and 29 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCo. Rd.

CrossesI-40 under

Location10.1 MI E Ok C/L

RouteCounty Highway N3390

CountyPottawatomie County

StateOklahoma

Coordinates35.38366, -96.96517

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.

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	7 Good	Some minor problems.

Last inspectionJune 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourBridge not over waterway

Structural evaluation6: Equal to present minimum criteria

Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is

Approach roadway alignment7: Better than present minimum criteria

Operating rating44 US tons

Inventory rating26 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans4

Design loadH 15

Structure length152 ft (46.3 m)

Longest span55 ft (16.8 m)

Deck width29 ft (8.8 m)

Roadway width24 ft (7.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2022)

Projected traffic440 by 2042

Trucks18%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesHighway

Detour if closed8.1 mi (13 km)

TollOn a free road

National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency

Maintained byState 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$1.9 million

NavigationNot applicable (no waterway)

Frequently asked questions

When was Co. Rd. over I-40 under built?

It was built in 1962, making it 63 years old in 2025.

What condition is Co. Rd. over I-40 under 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 June 2023.

How much traffic does Co. Rd. over I-40 under carry?

About 275 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is Co. Rd. over I-40 under?

The structure is 152 ft (46.3 m) long with a longest span of 55 ft (16.8 m) and a deck 29 ft wide.

Who owns Co. Rd. over I-40 under?

It is owned by the State Highway Agency.