US Bridges

N3947 (4th) over Coal Creek

Fair

Okmulgee County, Oklahoma · .2S of I-40 at Henryetta · Structure no. 300010000000000

Built
2013
12 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
62 ft
3 main spans
Daily traffic
1,325
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

N3947 (4th) over Coal Creek is a concrete culvert carrying N3947 (4th) over Coal Creek in Okmulgee County, Oklahoma. It was built in 2013, so it is 12 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 1,325 vehicles a day, roughly 5% of them trucks, projected to reach 1,617 by 2042. The structure is 62 ft (18.9 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesN3947 (4th)
CrossesCoal Creek
Location.2S of I-40 at Henryetta
RouteCity Street N3947
CountyOkmulgee County
StateOklahoma
Coordinates35.43194, -95.98583
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating102 US tons
Inventory rating61.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span20 ft (6.1 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,325 (2022)
Projected traffic1,617 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3947 (4th) over Coal Creek built?

It was built in 2013, making it 12 years old in 2025.

What condition is N3947 (4th) 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 August 2023.

How much traffic does N3947 (4th) over Coal Creek carry?

About 1,325 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is N3947 (4th) over Coal Creek?

The structure is 62 ft (18.9 m) long with a longest span of 20 ft (6.1 m) and a deck 42 ft wide.

Who owns N3947 (4th) over Coal Creek?

It is owned by the City or Municipal Highway Agency.