US Bridges

Co. Rd. N3640 over S.H. 3 under

Fair

Pontotoc County, Oklahoma · 12.8 MI SE JCT SH 1 · Structure no. 232000000000000

Built
1989
36 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
234 ft
2 main spans
Daily traffic
5,000
2022 count
Owner
State
State Highway Agency

About this bridge

Co. Rd. N3640 over S.H. 3 under is a steel continuous stringer/multi-beam or girder carrying Co. Rd. N3640 over S.H. 3 under in Pontotoc County, Oklahoma. It was built in 1989, so it is 36 years old, younger 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 5,000 vehicles a day, roughly 25% of them trucks, projected to reach 8,000 by 2042. The structure is 234 ft (71.3 m) long and 35 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesCo. Rd. N3640
CrossesS.H. 3 under
Location12.8 MI SE JCT SH 1
RouteCounty Highway N3640
CountyPontotoc County
StateOklahoma
Coordinates34.64182, -96.52966
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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating75.9 US tons
Inventory rating45.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length234 ft (71.3 m)
Longest span116 ft (35.4 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2022)
Projected traffic8,000 by 2042
Trucks25%
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$3.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Co. Rd. N3640 over S.H. 3 under built?

It was built in 1989, making it 36 years old in 2025.

What condition is Co. Rd. N3640 over S.H. 3 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 2024.

How much traffic does Co. Rd. N3640 over S.H. 3 under carry?

About 5,000 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is Co. Rd. N3640 over S.H. 3 under?

The structure is 234 ft (71.3 m) long with a longest span of 116 ft (35.4 m) and a deck 35 ft wide.

Who owns Co. Rd. N3640 over S.H. 3 under?

It is owned by the State Highway Agency.