US Bridges

N4633 (0136C) over Buzzard Creek

GoodPosted for load

Adair County, Oklahoma · 3.5S 2.3E of SH 100 · Structure no. 136950000000000

Built
1957
68 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
41
2022 count
Owner
County
County Highway Agency

About this bridge

N4633 (0136C) over Buzzard Creek is a concrete culvert carrying N4633 (0136C) over Buzzard Creek in Adair County, Oklahoma. It was built in 1957, so it is 68 years old, older 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. Its operating status is: posted for load restriction.

It carries about 41 vehicles a day, roughly 15% of them trucks, projected to reach 66 by 2042. The structure is 27 ft (8.1 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesN4633 (0136C)
CrossesBuzzard Creek
Location3.5S 2.3E of SH 100
RouteCounty Highway N4633
CountyAdair County
StateOklahoma
Coordinates35.71119, -94.76929
Functional classRural Major Collector

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.7 US tons
Inventory rating19.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length27 ft (8.1 m)
Longest span10 ft (3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2022)
Projected traffic66 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 N4633 (0136C) over Buzzard Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is N4633 (0136C) over Buzzard 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 July 2023.

How much traffic does N4633 (0136C) over Buzzard Creek carry?

About 41 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N4633 (0136C) over Buzzard Creek?

The structure is 27 ft (8.1 m) long with a longest span of 10 ft (3 m) and a deck 32 ft wide.

Who owns N4633 (0136C) over Buzzard Creek?

It is owned by the County Highway Agency.