US Bridges

S-21-12 Con over Jefferies Creek

Good

Florence County, South Carolina · City of Florence · Structure no. 000000000010400

Built
2019
6 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete
Length
140 ft
4 main spans
Daily traffic
3,500
2023 count
Owner
State
State Highway Agency

About this bridge

S-21-12 Con over Jefferies Creek is a concrete slab carrying S-21-12 Con over Jefferies Creek in Florence County, South Carolina. It was built in 2019, so it is 6 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 3,500 vehicles a day, roughly 6% of them trucks, projected to reach 2,100 by 2043. The structure is 140 ft (42.7 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS-21-12 Con
CrossesJefferies Creek
LocationCity of Florence
RouteState Highway 12
CountyFlorence County
StateSouth Carolina
Coordinates34.17303, -79.76241
Functional classUrban 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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length140 ft (42.7 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic3,500 (2023)
Projected traffic2,100 by 2043
Trucks6%
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 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 S-21-12 Con over Jefferies Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is S-21-12 Con over Jefferies 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 November 2023.

How much traffic does S-21-12 Con over Jefferies Creek carry?

About 3,500 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is S-21-12 Con over Jefferies Creek?

The structure is 140 ft (42.7 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns S-21-12 Con over Jefferies Creek?

It is owned by the State Highway Agency.