US Bridges

Sc 527 over Boggy Swamp

Poor

Williamsburg County, South Carolina · 3 MI SE of Kingstree · Structure no. 000000000001286

Built
1943
82 years old
Condition
Poor
inspected December 2024
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
1,450
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 527 over Boggy Swamp is a concrete continuous culvert carrying Sc 527 over Boggy Swamp in Williamsburg County, South Carolina. It was built in 1943, so it is 82 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,450 vehicles a day, roughly 13% of them trucks, projected to reach 2,117 by 2043. The structure is 32 ft (9.8 m) long and 48 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSc 527
CrossesBoggy Swamp
Location3 MI SE of Kingstree
RouteState Highway 527
CountyWilliamsburg County
StateSouth Carolina
Coordinates33.64202, -79.77852
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width48 ft (14.6 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,450 (2023)
Projected traffic2,117 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$255,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sc 527 over Boggy Swamp built?

It was built in 1943, making it 82 years old in 2025.

What condition is Sc 527 over Boggy Swamp in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does Sc 527 over Boggy Swamp carry?

About 1,450 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Sc 527 over Boggy Swamp?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m) and a deck 48 ft wide.

Who owns Sc 527 over Boggy Swamp?

It is owned by the State Highway Agency.