US Bridges

N3810 over Coal Creek

Fair

Coal County, Oklahoma · 1.1 S .5 W of Lehigh · Structure no. 071530000000000

Built
1939
86 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete
Length
44 ft
2 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3810 over Coal Creek is a concrete slab carrying N3810 over Coal Creek in Coal County, Oklahoma. It was built in 1939, so it is 86 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 44 ft (13.4 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesN3810
CrossesCoal Creek
Location1.1 S .5 W of Lehigh
RouteCounty Highway N3810
CountyCoal County
StateOklahoma
Coordinates34.45164, -96.23274
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length44 ft (13.4 m)
Longest span19 ft (5.9 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$327,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3810 over Coal Creek built?

It was built in 1939, making it 86 years old in 2025.

What condition is N3810 over Coal 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 February 2024.

How much traffic does N3810 over Coal Creek carry?

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

How long is N3810 over Coal Creek?

The structure is 44 ft (13.4 m) long with a longest span of 19 ft (5.9 m) and a deck 26 ft wide.

Who owns N3810 over Coal Creek?

It is owned by the County Highway Agency.