US Bridges

S-45-254 over Cedar Swamp

Good

Williamsburg County, South Carolina · 8.0 MI E Kingstree · Structure no. 000000000004230

Built
2001
24 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete Continuous
Length
66 ft
2 main spans
Daily traffic
150
2023 count
Owner
State
State Highway Agency

About this bridge

S-45-254 over Cedar Swamp is a concrete continuous slab carrying S-45-254 over Cedar Swamp in Williamsburg County, South Carolina. It was built in 2001, so it is 24 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 150 vehicles a day, roughly 5% of them trucks, projected to reach 192 by 2043. The structure is 66 ft (20.1 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS-45-254
CrossesCedar Swamp
Location8.0 MI E Kingstree
RouteState Highway 254
CountyWilliamsburg County
StateSouth Carolina
Coordinates33.63794, -79.66261
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating48.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length66 ft (20.1 m)
Longest span33 ft (10.1 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic192 by 2043
Trucks5%
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 S-45-254 over Cedar Swamp built?

It was built in 2001, making it 24 years old in 2025.

What condition is S-45-254 over Cedar Swamp 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 August 2023.

How much traffic does S-45-254 over Cedar Swamp carry?

About 150 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-45-254 over Cedar Swamp?

The structure is 66 ft (20.1 m) long with a longest span of 33 ft (10.1 m) and a deck 36 ft wide.

Who owns S-45-254 over Cedar Swamp?

It is owned by the State Highway Agency.