US Bridges

Sc 512 over Indiantown Swamp

Fair

Williamsburg County, South Carolina · 2.0 MI SW of Stuckey · Structure no. 000000000001580

Built
1948
77 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
1,250
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 512 over Indiantown Swamp is a concrete culvert carrying Sc 512 over Indiantown Swamp in Williamsburg County, South Carolina. It was built in 1948, so it is 77 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 1,250 vehicles a day, roughly 20% of them trucks, projected to reach 1,825 by 2043. The structure is 33 ft (10.1 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSc 512
CrossesIndiantown Swamp
Location2.0 MI SW of Stuckey
RouteState Highway 512
CountyWilliamsburg County
StateSouth Carolina
Coordinates33.71137, -79.53812
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating30.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width30 ft (9.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,250 (2023)
Projected traffic1,825 by 2043
Trucks20%
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 statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$134,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sc 512 over Indiantown Swamp built?

It was built in 1948, making it 77 years old in 2025.

What condition is Sc 512 over Indiantown 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 June 2023.

How much traffic does Sc 512 over Indiantown Swamp carry?

About 1,250 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is Sc 512 over Indiantown Swamp?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 30 ft wide.

Who owns Sc 512 over Indiantown Swamp?

It is owned by the State Highway Agency.