US Bridges

S-21-12 over Scl RR

Fair

Florence County, South Carolina · Church ST Florence · Structure no. 000000000007358

Built
1980
45 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
659 ft
9 main spans
Daily traffic
23,600
2023 count
Owner
State
State Highway Agency

About this bridge

S-21-12 over Scl RR is a steel stringer/multi-beam or girder carrying S-21-12 over Scl RR in Florence County, South Carolina. It was built in 1980, so it is 45 years old, younger 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 5 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 23,600 vehicles a day, roughly 4% of them trucks, projected to reach 15,812 by 2043. The structure is 659 ft (200.9 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesS-21-12
CrossesScl RR
LocationChurch ST Florence
RouteState Highway 12
CountyFlorence County
StateSouth Carolina
Coordinates34.19911, -79.76235
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.5 US tons
Inventory rating56.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length659 ft (200.9 m)
Longest span95 ft (29 m)
Deck width76 ft (23.3 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,600 (2023)
Projected traffic15,812 by 2043
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S-21-12 over Scl RR built?

It was built in 1980, making it 45 years old in 2025.

What condition is S-21-12 over Scl RR 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 April 2023.

How much traffic does S-21-12 over Scl RR carry?

About 23,600 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is S-21-12 over Scl RR?

The structure is 659 ft (200.9 m) long with a longest span of 95 ft (29 m) and a deck 76 ft wide.

Who owns S-21-12 over Scl RR?

It is owned by the State Highway Agency.