US Bridges

N4450 over Manard Bayou

FairPosted for load

Cherokee County, Oklahoma · 2. E 2.3 N of US 62 · Structure no. 223490000000000

Built
1989
36 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
138 ft
8 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N4450 over Manard Bayou is a concrete continuous slab carrying N4450 over Manard Bayou in Cherokee County, Oklahoma. It was built in 1989, so it is 36 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 138 ft (42.1 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesN4450
CrossesManard Bayou
Location2. E 2.3 N of US 62
RouteCounty Highway N4450
CountyCherokee County
StateOklahoma
Coordinates35.83163, -95.09171
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.9 US tons
Inventory rating21.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length138 ft (42.1 m)
Longest span12 ft (3.7 m)
Deck width24 ft (7.3 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 closed6.2 mi (10 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$650,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4450 over Manard Bayou built?

It was built in 1989, making it 36 years old in 2025.

What condition is N4450 over Manard Bayou 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 July 2024.

How much traffic does N4450 over Manard Bayou carry?

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

How long is N4450 over Manard Bayou?

The structure is 138 ft (42.1 m) long with a longest span of 12 ft (3.7 m) and a deck 24 ft wide.

Who owns N4450 over Manard Bayou?

It is owned by the County Highway Agency.