US Bridges

US 301 over Savannah River Swamp

Fair

Allendale County, South Carolina · 1MI N of Ga State Line · Structure no. 000000000004444

Built
1965
60 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
350 ft
14 main spans
Daily traffic
1,300
2023 count
Owner
State
State Highway Agency

About this bridge

US 301 over Savannah River Swamp is a concrete slab carrying US 301 over Savannah River Swamp in Allendale County, South Carolina. It was built in 1965, so it is 60 years old, older 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 1,300 vehicles a day, roughly 32% of them trucks, projected to reach 2,262 by 2043. The structure is 350 ft (106.7 m) long and 32 ft wide.

CarriesUS 301
CrossesSavannah River Swamp
Location1MI N of Ga State Line
RouteU.S. Route 301
Coordinates32.94322, -81.48943
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans14
Design loadH 20
Structure length350 ft (106.7 m)
Longest span25 ft (7.6 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2023)
Projected traffic2,262 by 2043
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 US 301 over Savannah River Swamp built?

It was built in 1965, making it 60 years old in 2025.

What condition is US 301 over Savannah River Swamp 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 US 301 over Savannah River Swamp carry?

About 1,300 vehicles per day (2023 count), of which roughly 32% are trucks.

How long is US 301 over Savannah River Swamp?

The structure is 350 ft (106.7 m) long with a longest span of 25 ft (7.6 m) and a deck 32 ft wide.

Who owns US 301 over Savannah River Swamp?

It is owned by the State Highway Agency.