US Bridges

Sc 402 over Wadboo Swamp

Fair

Berkeley County, South Carolina · 3.5MI E Moncks Crn · Structure no. 000000000001599

Built
2003
22 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
210 ft
7 main spans
Daily traffic
6,200
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 402 over Wadboo Swamp is a concrete continuous slab carrying Sc 402 over Wadboo Swamp in Berkeley County, South Carolina. It was built in 2003, so it is 22 years old, younger 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 6,200 vehicles a day, roughly 10% of them trucks, projected to reach 9,052 by 2043. The structure is 210 ft (64 m) long and 47 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesSc 402
CrossesWadboo Swamp
Location3.5MI E Moncks Crn
RouteState Highway 402
CountyBerkeley County
StateSouth Carolina
Coordinates33.19553, -79.95328
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating50.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 25 or greater
Structure length210 ft (64 m)
Longest span30 ft (9.1 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,200 (2023)
Projected traffic9,052 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 402 over Wadboo Swamp built?

It was built in 2003, making it 22 years old in 2025.

What condition is Sc 402 over Wadboo 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 September 2023.

How much traffic does Sc 402 over Wadboo Swamp carry?

About 6,200 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Sc 402 over Wadboo Swamp?

The structure is 210 ft (64 m) long with a longest span of 30 ft (9.1 m) and a deck 47 ft wide.

Who owns Sc 402 over Wadboo Swamp?

It is owned by the State Highway Agency.