US Bridges

US 601 over Halfway Swamp

Good

Calhoun County, South Carolina · 2 MI NE of St. Matthews · Structure no. 000000000008614

Built
1993
32 years old
Condition
Good
inspected July 2024
Type
Slab
Prestressed Concrete
Length
90 ft
3 main spans
Daily traffic
2,300
2023 count
Owner
State
State Highway Agency

About this bridge

US 601 over Halfway Swamp is a prestressed concrete slab carrying US 601 over Halfway Swamp in Calhoun County, South Carolina. It was built in 1993, so it is 32 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 2,300 vehicles a day, roughly 16% of them trucks, projected to reach 4,002 by 2043. The structure is 90 ft (27.4 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 601
CrossesHalfway Swamp
Location2 MI NE of St. Matthews
RouteU.S. Route 601
Coordinates33.68054, -80.75167
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 rating91.8 US tons
Inventory rating47.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span30 ft (9.1 m)
Deck width50 ft (15.1 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2023)
Projected traffic4,002 by 2043
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 601 over Halfway Swamp built?

It was built in 1993, making it 32 years old in 2025.

What condition is US 601 over Halfway 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 July 2024.

How much traffic does US 601 over Halfway Swamp carry?

About 2,300 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is US 601 over Halfway Swamp?

The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 50 ft wide.

Who owns US 601 over Halfway Swamp?

It is owned by the State Highway Agency.