US Bridges

Co. Rd. over I-40 under

Fair

Seminole County, Oklahoma · 17 MI E Pott. C/L · Structure no. 161380000000000

Built
1964
61 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
212 ft
2 main spans
Daily traffic
75
2022 count
Owner
State
State Highway Agency

About this bridge

Co. Rd. over I-40 under is a steel continuous stringer/multi-beam or girder carrying Co. Rd. over I-40 under in Seminole County, Oklahoma. It was built in 1964, so it is 61 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 75 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2042. The structure is 212 ft (64.6 m) long and 27 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

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CarriesCo. Rd.
CrossesI-40 under
Location17 MI E Pott. C/L
RouteCounty Highway N3670
CountySeminole County
StateOklahoma
Coordinates35.3844, -96.47668
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.9 US tons
Inventory rating22.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadH 15
Structure length212 ft (64.6 m)
Longest span73 ft (22.3 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic120 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed39.8 mi (64 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 1964, making it 61 years old in 2025.

What condition is Co. Rd. over I-40 under in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2024.

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

About 75 vehicles per day (2022 count), of which roughly 10% are trucks.

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

The structure is 212 ft (64.6 m) long with a longest span of 73 ft (22.3 m) and a deck 27 ft wide.

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

It is owned by the State Highway Agency.