US Bridges

US 301 over Sparrow Swamp

Good

Florence County, South Carolina · 6.3 MI NW of Coward · Structure no. 000000000009428

Built
1999
26 years old
Condition
Good
inspected March 2024
Type
Slab
Concrete Continuous
Length
450 ft
15 main spans
Daily traffic
3,400
2023 count
Owner
State
State Highway Agency

About this bridge

US 301 over Sparrow Swamp is a concrete continuous slab carrying US 301 over Sparrow Swamp in Florence 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 3,400 vehicles a day, roughly 11% of them trucks, projected to reach 4,964 by 2043. The structure is 450 ft (137.2 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 301
CrossesSparrow Swamp
Location6.3 MI NW of Coward
RouteU.S. Route 301
Coordinates34.02295, -79.84173
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating42.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans15 (+2 approach)
Design loadHS 25 or greater
Structure length450 ft (137.2 m)
Longest span30 ft (9.1 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2023)
Projected traffic4,964 by 2043
Trucks11%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 301 over Sparrow Swamp built?

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

What condition is US 301 over Sparrow 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 March 2024.

How much traffic does US 301 over Sparrow Swamp carry?

About 3,400 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 301 over Sparrow Swamp?

The structure is 450 ft (137.2 m) long with a longest span of 30 ft (9.1 m) and a deck 47 ft wide.

Who owns US 301 over Sparrow Swamp?

It is owned by the State Highway Agency.