US Bridges

S-21-57 over Bullocks Branch

Good

Florence County, South Carolina · 4 MI SE of Pamplico · Structure no. 000000000010842

Built
2023
2 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete
Length
45 ft
3 main spans
Daily traffic
1,950
2023 count
Owner
State
State Highway Agency

About this bridge

S-21-57 over Bullocks Branch is a concrete slab carrying S-21-57 over Bullocks Branch in Florence County, South Carolina. It was built in 2023, so it is 2 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 1,950 vehicles a day, roughly 14% of them trucks, projected to reach 2,847 by 2043. The structure is 45 ft (13.7 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesS-21-57
CrossesBullocks Branch
Location4 MI SE of Pamplico
RouteState Highway 57
CountyFlorence County
StateSouth Carolina
Coordinates33.94585, -79.50202
Functional classRural Major 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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating32.8 US tons
Inventory rating19.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 10
Structure length45 ft (13.7 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,950 (2023)
Projected traffic2,847 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$141,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-21-57 over Bullocks Branch built?

It was built in 2023, making it 2 years old in 2025.

What condition is S-21-57 over Bullocks Branch 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 April 2023.

How much traffic does S-21-57 over Bullocks Branch carry?

About 1,950 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is S-21-57 over Bullocks Branch?

The structure is 45 ft (13.7 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-21-57 over Bullocks Branch?

It is owned by the State Highway Agency.