US Bridges

Sc 34 over Swift Creek

Good

Darlington County, South Carolina · In Darlington · Structure no. 000000000000931

Built
1939
86 years old
Condition
Good
inspected February 2024
Type
Tee Beam
Concrete
Length
90 ft
3 main spans
Daily traffic
7,400
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 34 over Swift Creek is a concrete tee beam carrying Sc 34 over Swift Creek in Darlington County, South Carolina. It was built in 1939, so it is 86 years old, older 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 7,400 vehicles a day, roughly 2% of them trucks, projected to reach 4,958 by 2043. The structure is 90 ft (27.4 m) long and 53 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSc 34
CrossesSwift Creek
LocationIn Darlington
RouteState Highway 34
Coordinates34.31222, -79.86
Functional classUrban Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating37.8 US tons
Inventory rating28.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length90 ft (27.4 m)
Longest span30 ft (9.1 m)
Deck width53 ft (16.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,400 (2023)
Projected traffic4,958 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$585,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sc 34 over Swift Creek built?

It was built in 1939, making it 86 years old in 2025.

What condition is Sc 34 over Swift Creek 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 Sc 34 over Swift Creek carry?

About 7,400 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Sc 34 over Swift Creek?

The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 53 ft wide.

Who owns Sc 34 over Swift Creek?

It is owned by the State Highway Agency.