US Bridges

US 301 over Pocotaligo Swamp (no. 1)

Good

Clarendon County, South Carolina · 0.5MI N of Manning · Structure no. 000000000007229

Built
2006
19 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
120 ft
4 main spans
Daily traffic
9,700
2023 count
Owner
State
State Highway Agency

About this bridge

US 301 over Pocotaligo Swamp (no. 1) is a concrete continuous stringer/multi-beam or girder carrying US 301 over Pocotaligo Swamp (no. 1) in Clarendon County, South Carolina. It was built in 2006, so it is 19 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 9,700 vehicles a day, roughly 8% of them trucks, projected to reach 16,878 by 2043. The structure is 120 ft (36.6 m) long and 86 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesUS 301
CrossesPocotaligo Swamp (no. 1)
Location0.5MI N of Manning
RouteU.S. Route 301
CountyClarendon County
StateSouth Carolina
Coordinates33.70925, -80.20522
Functional classRural Principal Arterial - Other

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 inspectionOctober 2023
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 geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating100.8 US tons
Inventory rating60.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length120 ft (36.6 m)
Longest span30 ft (9.1 m)
Deck width86 ft (26.2 m)
Roadway width83 ft (25.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,700 (2023)
Projected traffic16,878 by 2043
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
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 Pocotaligo Swamp (no. 1) built?

It was built in 2006, making it 19 years old in 2025.

What condition is US 301 over Pocotaligo Swamp (no. 1) 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 October 2023.

How much traffic does US 301 over Pocotaligo Swamp (no. 1) carry?

About 9,700 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is US 301 over Pocotaligo Swamp (no. 1)?

The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 86 ft wide.

Who owns US 301 over Pocotaligo Swamp (no. 1)?

It is owned by the State Highway Agency.