US Bridges

Sc 120 over Sammy Swamp

Fair

Sumter County, South Carolina · 2 MI N of Pinewood · Structure no. 000000000000463

Built
1930
95 years old, rebuilt 1965
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
1,850
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 120 over Sammy Swamp is a concrete culvert carrying Sc 120 over Sammy Swamp in Sumter County, South Carolina. It was built in 1930 and reconstructed in 1965, so it is 95 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 1,850 vehicles a day, roughly 6% of them trucks, projected to reach 2,701 by 2043. The structure is 32 ft (9.8 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSc 120
CrossesSammy Swamp
Location2 MI N of Pinewood
RouteState Highway 120
CountySumter County
StateSouth Carolina
Coordinates33.77429, -80.44766
Functional classRural Major 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.6 US tons
Inventory rating20.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width46 ft (14 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,850 (2023)
Projected traffic2,701 by 2043
Trucks6%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sc 120 over Sammy Swamp built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1965.

What condition is Sc 120 over Sammy 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 2024.

How much traffic does Sc 120 over Sammy Swamp carry?

About 1,850 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Sc 120 over Sammy Swamp?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m) and a deck 46 ft wide.

Who owns Sc 120 over Sammy Swamp?

It is owned by the State Highway Agency.