US Bridges

S-26-24 over Palmetto Swamp Box Culve

Good

Horry County, South Carolina · 7 MI S Aynor · Structure no. 000000000001510

Built
1948
77 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
1,750
2023 count
Owner
State
State Highway Agency

About this bridge

S-26-24 over Palmetto Swamp Box Culve is a concrete culvert carrying S-26-24 over Palmetto Swamp Box Culve in Horry County, South Carolina. It was built in 1948, so it is 77 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,750 vehicles a day, roughly 17% of them trucks, projected to reach 2,555 by 2043. The structure is 33 ft (10 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesS-26-24
CrossesPalmetto Swamp Box Culve
Location7 MI S Aynor
RouteState Highway 24
Coordinates33.9043, -79.23138
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating30.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length33 ft (10 m)
Longest span10 ft (3 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,750 (2023)
Projected traffic2,555 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$123,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-26-24 over Palmetto Swamp Box Culve built?

It was built in 1948, making it 77 years old in 2025.

What condition is S-26-24 over Palmetto Swamp Box Culve 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 June 2023.

How much traffic does S-26-24 over Palmetto Swamp Box Culve carry?

About 1,750 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is S-26-24 over Palmetto Swamp Box Culve?

The structure is 33 ft (10 m) long with a longest span of 10 ft (3 m) and a deck 30 ft wide.

Who owns S-26-24 over Palmetto Swamp Box Culve?

It is owned by the State Highway Agency.