US Bridges

I-95 SB over Four Hole Swamp

Fair

Orangeburg County, South Carolina · 8 MI W of Holly Hill · Structure no. 000000000006353

Built
1973
52 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete
Length
240 ft
8 main spans
Daily traffic
17,900
2023 count
Owner
State
State Highway Agency

About this bridge

I-95 SB over Four Hole Swamp is a concrete slab carrying I-95 SB over Four Hole Swamp in Orangeburg County, South Carolina. It was built in 1973, so it is 52 years old, older 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 17,900 vehicles a day, roughly 22% of them trucks, projected to reach 31,325 by 2043. The structure is 240 ft (73.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-95 SB
CrossesFour Hole Swamp
Location8 MI W of Holly Hill
RouteInterstate 95
Coordinates33.34514, -80.53352
Functional classRural Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating46.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length240 ft (73.2 m)
Longest span30 ft (9.1 m)
Deck width43 ft (13.1 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,900 (2023)
Projected traffic31,325 by 2043
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-95 SB over Four Hole Swamp built?

It was built in 1973, making it 52 years old in 2025.

What condition is I-95 SB over Four Hole 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 2023.

How much traffic does I-95 SB over Four Hole Swamp carry?

About 17,900 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is I-95 SB over Four Hole Swamp?

The structure is 240 ft (73.2 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.

Who owns I-95 SB over Four Hole Swamp?

It is owned by the State Highway Agency.