US Bridges

Co. Rd. N4370 over I-40 under

Fair

Muskogee County, Oklahoma · 6.1 MI E Mcintosh · Structure no. 181050000000000

Built
1971
54 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
220 ft
2 main spans
Daily traffic
250
2022 count
Owner
State
State Highway Agency

About this bridge

Co. Rd. N4370 over I-40 under is a steel continuous stringer/multi-beam or girder carrying Co. Rd. N4370 over I-40 under in Muskogee County, Oklahoma. It was built in 1971, so it is 54 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 250 vehicles a day, roughly 12% of them trucks, projected to reach 400 by 2042. The structure is 220 ft (67.1 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCo. Rd. N4370
CrossesI-40 under
Location6.1 MI E Mcintosh
RouteCounty Highway N4370
CountyMuskogee County
StateOklahoma
Coordinates35.48232, -95.23878
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome 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 alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length220 ft (67.1 m)
Longest span109 ft (33.2 m)
Deck width30 ft (9.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2022)
Projected traffic400 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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. N4370 over I-40 under built?

It was built in 1971, making it 54 years old in 2025.

What condition is Co. Rd. N4370 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 June 2023.

How much traffic does Co. Rd. N4370 over I-40 under carry?

About 250 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Co. Rd. N4370 over I-40 under?

The structure is 220 ft (67.1 m) long with a longest span of 109 ft (33.2 m) and a deck 30 ft wide.

Who owns Co. Rd. N4370 over I-40 under?

It is owned by the State Highway Agency.