US Bridges

N4627 (0152C) over Lunar Creek

PoorPosted for load

Adair County, Oklahoma · .3N of Chewey · Structure no. 046230000000000

Built
1936
89 years old
Condition
Poor
inspected July 2023
Type
Slab
Concrete
Length
22 ft
2 main spans
Daily traffic
207
2022 count
Owner
County
County Highway Agency

About this bridge

N4627 (0152C) over Lunar Creek is a concrete slab carrying N4627 (0152C) over Lunar Creek in Adair County, Oklahoma. It was built in 1936, so it is 89 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 207 vehicles a day, roughly 15% of them trucks, projected to reach 331 by 2042. The structure is 22 ft (6.7 m) long and 26 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesN4627 (0152C)
CrossesLunar Creek
Location.3N of Chewey
RouteCounty Highway N4627
CountyAdair County
StateOklahoma
Coordinates36.10602, -94.76582
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, 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 protection5 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
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating32 US tons
Inventory rating19 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic207 (2022)
Projected traffic331 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4627 (0152C) over Lunar Creek built?

It was built in 1936, making it 89 years old in 2025.

What condition is N4627 (0152C) over Lunar Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does N4627 (0152C) over Lunar Creek carry?

About 207 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N4627 (0152C) over Lunar Creek?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.

Who owns N4627 (0152C) over Lunar Creek?

It is owned by the County Highway Agency.