US Bridges

US 378 over S.C.L. Railroad

Fair

Marion County, South Carolina · 1 MI S of Gresham · Structure no. 000000000001829

Built
1951
74 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
140 ft
3 main spans
Daily traffic
8,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 378 over S.C.L. Railroad is a concrete tee beam carrying US 378 over S.C.L. Railroad in Marion County, South Carolina. It was built in 1951, so it is 74 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 5 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 8,500 vehicles a day, roughly 20% of them trucks, projected to reach 14,790 by 2043. The structure is 140 ft (42.7 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 378
CrossesS.C.L. Railroad
Location1 MI S of Gresham
RouteU.S. Route 378
CountyMarion County
StateSouth Carolina
Coordinates33.91431, -79.41329
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length140 ft (42.7 m)
Longest span50 ft (15.2 m)
Deck width32 ft (9.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,500 (2023)
Projected traffic14,790 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$555,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 378 over S.C.L. Railroad built?

It was built in 1951, making it 74 years old in 2025.

What condition is US 378 over S.C.L. Railroad 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 July 2024.

How much traffic does US 378 over S.C.L. Railroad carry?

About 8,500 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is US 378 over S.C.L. Railroad?

The structure is 140 ft (42.7 m) long with a longest span of 50 ft (15.2 m) and a deck 32 ft wide.

Who owns US 378 over S.C.L. Railroad?

It is owned by the State Highway Agency.