US Bridges

S.H. 56 over Negro Creek Oflow

Fair

Okmulgee County, Oklahoma · 14.75 E Okfuskee C/L · Structure no. 271620000000000

Built
2004
21 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete Continuous
Length
98 ft
3 main spans
Daily traffic
1,300
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 56 over Negro Creek Oflow is a concrete continuous slab carrying S.H. 56 over Negro Creek Oflow in Okmulgee County, Oklahoma. It was built in 2004, so it is 21 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 1,300 vehicles a day, roughly 15% of them trucks, projected to reach 2,080 by 2042. The structure is 98 ft (30 m) long and 42 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

CarriesS.H. 56
CrossesNegro Creek Oflow
Location14.75 E Okfuskee C/L
RouteState Highway 56
Coordinates35.62158, -96.00563
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.4 US tons
Inventory rating49.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length98 ft (30 m)
Longest span33 ft (10 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2022)
Projected traffic2,080 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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$1.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 56 over Negro Creek Oflow built?

It was built in 2004, making it 21 years old in 2025.

What condition is S.H. 56 over Negro Creek Oflow 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 2023.

How much traffic does S.H. 56 over Negro Creek Oflow carry?

About 1,300 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 56 over Negro Creek Oflow?

The structure is 98 ft (30 m) long with a longest span of 33 ft (10 m) and a deck 42 ft wide.

Who owns S.H. 56 over Negro Creek Oflow?

It is owned by the State Highway Agency.