US Bridges

S-26-497 over Palmetto Swamp

Fair

Horry County, South Carolina · Town of Loris · Structure no. 000000000010862

Built
2023
2 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
275
2024 count
Owner
State
State Highway Agency

About this bridge

S-26-497 over Palmetto Swamp is a concrete culvert carrying S-26-497 over Palmetto Swamp in Horry County, South Carolina. It was built in 2023, so it is 2 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 275 vehicles a day, roughly 5% of them trucks, projected to reach 352 by 2044. The structure is 27 ft (8.1 m) long and 42 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesS-26-497
CrossesPalmetto Swamp
LocationTown of Loris
RouteState Highway 497
Coordinates33.91147, -79.18988
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length27 ft (8.1 m)
Longest span12 ft (3.7 m)
Deck width42 ft (12.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2024)
Projected traffic352 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-26-497 over Palmetto Swamp built?

It was built in 2023, making it 2 years old in 2025.

What condition is S-26-497 over Palmetto Swamp 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 December 2024.

How much traffic does S-26-497 over Palmetto Swamp carry?

About 275 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is S-26-497 over Palmetto Swamp?

The structure is 27 ft (8.1 m) long with a longest span of 12 ft (3.7 m) and a deck 42 ft wide.

Who owns S-26-497 over Palmetto Swamp?

It is owned by the State Highway Agency.