US Bridges

S-17-46 over Buck Swamp

Good

Dillon County, South Carolina · 1MI S Floydale · Structure no. 000000000009421

Built
1999
26 years old
Condition
Good
inspected February 2024
Type
Slab
Concrete Continuous
Length
164 ft
5 main spans
Daily traffic
1,050
2023 count
Owner
State
State Highway Agency

About this bridge

S-17-46 over Buck Swamp is a concrete continuous slab carrying S-17-46 over Buck Swamp in Dillon County, South Carolina. It was built in 1999, so it is 26 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 1,050 vehicles a day, roughly 6% of them trucks, projected to reach 1,533 by 2043. The structure is 164 ft (50 m) long and 36 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesS-17-46
CrossesBuck Swamp
Location1MI S Floydale
RouteState Highway 46
Coordinates34.30653, -79.33825
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 protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating50 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length164 ft (50 m)
Longest span33 ft (10.1 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2023)
Projected traffic1,533 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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-17-46 over Buck Swamp built?

It was built in 1999, making it 26 years old in 2025.

What condition is S-17-46 over Buck 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 February 2024.

How much traffic does S-17-46 over Buck Swamp carry?

About 1,050 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is S-17-46 over Buck Swamp?

The structure is 164 ft (50 m) long with a longest span of 33 ft (10.1 m) and a deck 36 ft wide.

Who owns S-17-46 over Buck Swamp?

It is owned by the State Highway Agency.