US Bridges

US 378 EB over Black River Swamp (no. 2

Fair

Sumter County, South Carolina · 10 MI E of Sumter · Structure no. 000000000006193

Built
1972
53 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
210 ft
7 main spans
Daily traffic
5,600
2023 count
Owner
State
State Highway Agency

About this bridge

US 378 EB over Black River Swamp (no. 2 is a concrete tee beam carrying US 378 EB over Black River Swamp (no. 2 in Sumter County, South Carolina. It was built in 1972, so it is 53 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 5,600 vehicles a day, roughly 13% of them trucks, projected to reach 9,744 by 2043. The structure is 210 ft (64 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 378 EB
CrossesBlack River Swamp (no. 2
Location10 MI E of Sumter
RouteU.S. Route 378
Coordinates33.89961, -80.16566
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating45 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length210 ft (64 m)
Longest span30 ft (9.1 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,600 (2023)
Projected traffic9,744 by 2043
Trucks13%
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 US 378 EB over Black River Swamp (no. 2 built?

It was built in 1972, making it 53 years old in 2025.

What condition is US 378 EB over Black River Swamp (no. 2 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 June 2024.

How much traffic does US 378 EB over Black River Swamp (no. 2 carry?

About 5,600 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is US 378 EB over Black River Swamp (no. 2?

The structure is 210 ft (64 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.

Who owns US 378 EB over Black River Swamp (no. 2?

It is owned by the State Highway Agency.