US Bridges

Sc 641 over Salkehatchie River Swamp

Good

Bamberg County, South Carolina · 0.25 MI E-Allendale Coln · Structure no. 000000000009553

Built
2001
24 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete Continuous
Length
150 ft
5 main spans
Daily traffic
900
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 641 over Salkehatchie River Swamp is a concrete continuous slab carrying Sc 641 over Salkehatchie River Swamp in Bamberg 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 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 900 vehicles a day, roughly 26% of them trucks, projected to reach 1,314 by 2043. The structure is 150 ft (45.7 m) long and 43 ft wide.

CarriesSc 641
CrossesSalkehatchie River Swamp
Location0.25 MI E-Allendale Coln
RouteState Highway 641
Coordinates33.04635, -81.09262
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating50 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length150 ft (45.7 m)
Longest span30 ft (9.1 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2023)
Projected traffic1,314 by 2043
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 641 over Salkehatchie River Swamp built?

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

What condition is Sc 641 over Salkehatchie River 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 April 2024.

How much traffic does Sc 641 over Salkehatchie River Swamp carry?

About 900 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is Sc 641 over Salkehatchie River Swamp?

The structure is 150 ft (45.7 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.

Who owns Sc 641 over Salkehatchie River Swamp?

It is owned by the State Highway Agency.