US Bridges

N3720 over Turkey Creek

Fair

Coal County, Oklahoma · 2 E & 2 N of Tupelo · Structure no. 207260000000000

Built
1984
41 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3720 over Turkey Creek is a prestressed concrete tee beam carrying N3720 over Turkey Creek in Coal County, Oklahoma. It was built in 1984, so it is 41 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 5 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 56 ft (17.1 m) long and 28 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesN3720
CrossesTurkey Creek
Location2 E & 2 N of Tupelo
RouteCounty Highway N3720
CountyCoal County
StateOklahoma
Coordinates34.63196, -96.38951
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span53 ft (16.2 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$373,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3720 over Turkey Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is N3720 over Turkey Creek 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 January 2024.

How much traffic does N3720 over Turkey Creek carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3720 over Turkey Creek?

The structure is 56 ft (17.1 m) long with a longest span of 53 ft (16.2 m) and a deck 28 ft wide.

Who owns N3720 over Turkey Creek?

It is owned by the County Highway Agency.