US Bridges

S-45-28 over Kingstree Swamp Canal

Good

Williamsburg County, South Carolina · 2.0 MI W Cades · Structure no. 000000000009100

Built
1996
29 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete Continuous
Length
74 ft
3 main spans
Daily traffic
850
2023 count
Owner
State
State Highway Agency

About this bridge

S-45-28 over Kingstree Swamp Canal is a concrete continuous slab carrying S-45-28 over Kingstree Swamp Canal in Williamsburg County, South Carolina. It was built in 1996, so it is 29 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 850 vehicles a day, roughly 18% of them trucks, projected to reach 1,241 by 2043. The structure is 74 ft (22.6 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesS-45-28
CrossesKingstree Swamp Canal
Location2.0 MI W Cades
RouteState Highway 28
Coordinates33.79669, -79.82186
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating51.8 US tons
Inventory rating39.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length74 ft (22.6 m)
Longest span30 ft (9.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2023)
Projected traffic1,241 by 2043
Trucks18%
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 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 S-45-28 over Kingstree Swamp Canal built?

It was built in 1996, making it 29 years old in 2025.

What condition is S-45-28 over Kingstree Swamp Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does S-45-28 over Kingstree Swamp Canal carry?

About 850 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is S-45-28 over Kingstree Swamp Canal?

The structure is 74 ft (22.6 m) long with a longest span of 30 ft (9.1 m) and a deck 35 ft wide.

Who owns S-45-28 over Kingstree Swamp Canal?

It is owned by the State Highway Agency.