US Bridges

Sc 641 over Salkehatchie River

Fair

Allendale County, South Carolina · 4.5 MI E of Sycamore · Structure no. 000000000009551

Built
2001
24 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
180 ft
6 main spans
Daily traffic
1,000
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 641 over Salkehatchie River is a concrete continuous slab carrying Sc 641 over Salkehatchie River in Allendale 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 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 1,000 vehicles a day, roughly 24% of them trucks, projected to reach 1,460 by 2043. The structure is 180 ft (54.9 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesSc 641
CrossesSalkehatchie River
Location4.5 MI E of Sycamore
RouteState Highway 641
CountyAllendale County
StateSouth Carolina
Coordinates33.04461, -81.10428
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating62.5 US tons
Inventory rating48.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 25 or greater
Structure length180 ft (54.9 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 traffic1,000 (2023)
Projected traffic1,460 by 2043
Trucks24%
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 built?

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

What condition is Sc 641 over Salkehatchie River 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 May 2024.

How much traffic does Sc 641 over Salkehatchie River carry?

About 1,000 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is Sc 641 over Salkehatchie River?

The structure is 180 ft (54.9 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?

It is owned by the State Highway Agency.