US Bridges

I-95 over Douglas Swamp

Fair

Sumter County, South Carolina · 20 MI E of Sumter · Structure no. 000000000005165

Built
1967
58 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
33,700
2023 count
Owner
State
State Highway Agency

About this bridge

I-95 over Douglas Swamp is a concrete culvert carrying I-95 over Douglas Swamp in Sumter County, South Carolina. It was built in 1967, so it is 58 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 33,700 vehicles a day, roughly 22% of them trucks, projected to reach 58,975 by 2043. The structure is 32 ft (9.7 m) long and 184 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI-95
CrossesDouglas Swamp
Location20 MI E of Sumter
RouteInterstate 95
CountySumter County
StateSouth Carolina
Coordinates34.00124, -80.00602
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.1 US tons
Inventory rating47.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 15
Structure length32 ft (9.7 m)
Longest span10 ft (3 m)
Deck width184 ft (56.1 m)
Roadway width182 ft (55.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,700 (2023)
Projected traffic58,975 by 2043
Trucks22%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 over Douglas Swamp built?

It was built in 1967, making it 58 years old in 2025.

What condition is I-95 over Douglas 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 November 2023.

How much traffic does I-95 over Douglas Swamp carry?

About 33,700 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is I-95 over Douglas Swamp?

The structure is 32 ft (9.7 m) long with a longest span of 10 ft (3 m) and a deck 184 ft wide.

Who owns I-95 over Douglas Swamp?

It is owned by the State Highway Agency.