US Bridges

N4740 (0134C) over Shell Branch Creek

FairPosted for load

Adair County, Oklahoma · .8E 2S of US 59 · Structure no. 046300000000000

Built
1936
89 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
413
2022 count
Owner
County
County Highway Agency

About this bridge

N4740 (0134C) over Shell Branch Creek is a concrete continuous slab carrying N4740 (0134C) over Shell Branch 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 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 413 vehicles a day, roughly 15% of them trucks, projected to reach 661 by 2042. The structure is 26 ft (7.9 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesN4740 (0134C)
CrossesShell Branch Creek
Location.8E 2S of US 59
RouteCounty Highway 134C
CountyAdair County
StateOklahoma
Coordinates35.95825, -94.57013
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating27 US tons
Inventory rating16 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length26 ft (7.9 m)
Longest span10 ft (3 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic413 (2022)
Projected traffic661 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 N4740 (0134C) over Shell Branch Creek built?

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

What condition is N4740 (0134C) over Shell Branch 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 N4740 (0134C) over Shell Branch Creek carry?

About 413 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N4740 (0134C) over Shell Branch Creek?

The structure is 26 ft (7.9 m) long with a longest span of 10 ft (3 m) and a deck 24 ft wide.

Who owns N4740 (0134C) over Shell Branch Creek?

It is owned by the County Highway Agency.