US Bridges

Sc 51 over Black River

Fair

Georgetown County, South Carolina · 14 MI NW Georgetown · Structure no. 000000000006494

Built
1974
51 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
600 ft
4 main spans
Daily traffic
4,100
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 51 over Black River is a prestressed concrete stringer/multi-beam or girder carrying Sc 51 over Black River in Georgetown County, South Carolina. It was built in 1974, so it is 51 years old, older 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 4,100 vehicles a day, roughly 11% of them trucks, projected to reach 6,519 by 2043. The structure is 600 ft (182.9 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSc 51
CrossesBlack River
Location14 MI NW Georgetown
RouteState Highway 51
CountyGeorgetown County
StateSouth Carolina
Coordinates33.547, -79.40091
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating26.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4 (+10 approach)
Design loadHS 20
Structure length600 ft (182.9 m)
Longest span75 ft (22.9 m)
Deck width38 ft (11.5 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2023)
Projected traffic6,519 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sc 51 over Black River built?

It was built in 1974, making it 51 years old in 2025.

What condition is Sc 51 over Black River 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 Sc 51 over Black River carry?

About 4,100 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Sc 51 over Black River?

The structure is 600 ft (182.9 m) long with a longest span of 75 ft (22.9 m) and a deck 38 ft wide.

Who owns Sc 51 over Black River?

It is owned by the State Highway Agency.