US Bridges

N4720 over Coal Creek

Good

Le Flore County, Oklahoma · 0.8 S; 0.5 W Howe · Structure no. 245570000000000

Built
1994
31 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
52 ft
4 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N4720 over Coal Creek is a concrete culvert carrying N4720 over Coal Creek in Le Flore County, Oklahoma. It was built in 1994, so it is 31 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 52 ft (15.9 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesN4720
CrossesCoal Creek
Location0.8 S; 0.5 W Howe
RouteCounty Highway N4720
Coordinates34.93973, -94.64614
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length52 ft (15.9 m)
Longest span12 ft (3.7 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 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 closed3.1 mi (5 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4720 over Coal Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is N4720 over Coal Creek 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 February 2023.

How much traffic does N4720 over Coal Creek carry?

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

How long is N4720 over Coal Creek?

The structure is 52 ft (15.9 m) long with a longest span of 12 ft (3.7 m) and a deck 32 ft wide.

Who owns N4720 over Coal Creek?

It is owned by the County Highway Agency.