US Bridges

Sc 261 over Sammy Swamp

Fair

Sumter County, South Carolina · 3 MI E of Pinewood · Structure no. 000000000006584

Built
1974
51 years old
Condition
Fair
inspected March 2024
Type
Channel Beam
Prestressed Concrete
Length
90 ft
3 main spans
Daily traffic
1,900
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 261 over Sammy Swamp is a prestressed concrete channel beam carrying Sc 261 over Sammy Swamp in Sumter County, South Carolina. It was built in 1974, so it is 51 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 1,900 vehicles a day, roughly 14% of them trucks, projected to reach 3,021 by 2043. The structure is 90 ft (27.4 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSc 261
CrossesSammy Swamp
Location3 MI E of Pinewood
RouteState Highway 261
CountySumter County
StateSouth Carolina
Coordinates33.7426, -80.41071
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.1 US tons
Inventory rating13.6 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length90 ft (27.4 m)
Longest span30 ft (9.1 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2023)
Projected traffic3,021 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Sc 261 over Sammy Swamp built?

It was built in 1974, making it 51 years old in 2025.

What condition is Sc 261 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 March 2024.

How much traffic does Sc 261 over Sammy Swamp carry?

About 1,900 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Sc 261 over Sammy Swamp?

The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 34 ft wide.

Who owns Sc 261 over Sammy Swamp?

It is owned by the State Highway Agency.