US Bridges

N4630 (0124C) over Creek

FairPosted for load

Adair County, Oklahoma · 2E 1.4S of SH 51 · Structure no. 133410000000000

Built
1955
70 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
253
2022 count
Owner
County
County Highway Agency

About this bridge

N4630 (0124C) over Creek is a concrete culvert carrying N4630 (0124C) over Creek in Adair County, Oklahoma. It was built in 1955, so it is 70 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 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 253 vehicles a day, roughly 15% of them trucks, projected to reach 405 by 2042. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesN4630 (0124C)
CrossesCreek
Location2E 1.4S of SH 51
RouteCounty Highway N4630
CountyAdair County
StateOklahoma
Coordinates35.87577, -94.77222
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic253 (2022)
Projected traffic405 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 N4630 (0124C) over Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is N4630 (0124C) over 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 July 2023.

How much traffic does N4630 (0124C) over Creek carry?

About 253 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N4630 (0124C) over Creek?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m).

Who owns N4630 (0124C) over Creek?

It is owned by the County Highway Agency.