US Bridges

S-43-346 over Gum Swamp Branch

Good

Sumter County, South Carolina · 15 MI NW of Sumter · Structure no. 000000000009285

Built
1997
28 years old
Condition
Good
inspected May 2023
Type
Slab
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
100
2023 count
Owner
State
State Highway Agency

About this bridge

S-43-346 over Gum Swamp Branch is a prestressed concrete slab carrying S-43-346 over Gum Swamp Branch in Sumter 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 1% of them trucks, projected to reach 139 by 2043. The structure is 50 ft (15.2 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesS-43-346
CrossesGum Swamp Branch
Location15 MI NW of Sumter
RouteState Highway 346
Coordinates34.01133, -80.57343
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.9 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span50 ft (15.2 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic139 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 S-43-346 over Gum Swamp Branch built?

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

What condition is S-43-346 over Gum Swamp Branch 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 May 2023.

How much traffic does S-43-346 over Gum Swamp Branch carry?

About 100 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is S-43-346 over Gum Swamp Branch?

The structure is 50 ft (15.2 m) long with a longest span of 50 ft (15.2 m) and a deck 36 ft wide.

Who owns S-43-346 over Gum Swamp Branch?

It is owned by the State Highway Agency.