US Bridges

S-43-40 over Mush Swamp

FairPosted for load

Sumter County, South Carolina · 7 MI W of Sumter · Structure no. 000000000006018

Built
1971
54 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
45 ft
3 main spans
Daily traffic
3,200
2023 count
Owner
State
State Highway Agency

About this bridge

S-43-40 over Mush Swamp is a concrete slab carrying S-43-40 over Mush Swamp in Sumter County, South Carolina. It was built in 1971, so it is 54 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. Its operating status is: posted for load restriction.

It carries about 3,200 vehicles a day, roughly 3% of them trucks, projected to reach 4,000 by 2043. The structure is 45 ft (13.7 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesS-43-40
CrossesMush Swamp
Location7 MI W of Sumter
RouteState Highway 40
CountySumter County
StateSouth Carolina
Coordinates33.94349, -80.45225
Functional classUrban Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.6 US tons
Inventory rating20 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length45 ft (13.7 m)
Longest span15 ft (4.6 m)
Deck width33 ft (10 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2023)
Projected traffic4,000 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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-43-40 over Mush Swamp built?

It was built in 1971, making it 54 years old in 2025.

What condition is S-43-40 over Mush 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 May 2023.

How much traffic does S-43-40 over Mush Swamp carry?

About 3,200 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S-43-40 over Mush Swamp?

The structure is 45 ft (13.7 m) long with a longest span of 15 ft (4.6 m) and a deck 33 ft wide.

Who owns S-43-40 over Mush Swamp?

It is owned by the State Highway Agency.