US Bridges

S-25-54 over Whippy Swamp

Good

Hampton County, South Carolina · 5.5MI NE Hampton · Structure no. 000000000009204

Built
1997
28 years old
Condition
Good
inspected March 2023
Type
Slab
Concrete Continuous
Length
197 ft
6 main spans
Daily traffic
150
2023 count
Owner
State
State Highway Agency

About this bridge

S-25-54 over Whippy Swamp is a concrete continuous slab carrying S-25-54 over Whippy Swamp in Hampton County, South Carolina. It was built in 1997, so it is 28 years old, younger 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 150 vehicles a day, roughly 4% of them trucks, projected to reach 219 by 2043. The structure is 197 ft (60 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesS-25-54
CrossesWhippy Swamp
Location5.5MI NE Hampton
RouteState Highway 54
CountyHampton County
StateSouth Carolina
Coordinates32.9282, -81.04056
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating51.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length197 ft (60 m)
Longest span33 ft (10.1 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic219 by 2043
Trucks4%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-25-54 over Whippy Swamp built?

It was built in 1997, making it 28 years old in 2025.

What condition is S-25-54 over Whippy Swamp 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 March 2023.

How much traffic does S-25-54 over Whippy Swamp carry?

About 150 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is S-25-54 over Whippy Swamp?

The structure is 197 ft (60 m) long with a longest span of 33 ft (10.1 m) and a deck 36 ft wide.

Who owns S-25-54 over Whippy Swamp?

It is owned by the State Highway Agency.