US Bridges

Sc 48 over Rocky Branch

Good

Richland County, South Carolina · 1 MI S of Columbia · Structure no. 000000000001761

Built
1950
75 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
23,000
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 48 over Rocky Branch is a concrete culvert carrying Sc 48 over Rocky Branch in Richland County, South Carolina. It was built in 1950, so it is 75 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 23,000 vehicles a day, roughly 5% of them trucks, projected to reach 31,050 by 2043. The structure is 21 ft (6.4 m) long and 150 ft wide.

Location

Open in Google Maps
CarriesSc 48
CrossesRocky Branch
Location1 MI S of Columbia
RouteState Highway 48
CountyRichland County
StateSouth Carolina
Coordinates33.98529, -81.0284
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.2 US tons
Inventory rating28.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width150 ft (45.7 m)
Roadway width78 ft (23.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,000 (2023)
Projected traffic31,050 by 2043
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sc 48 over Rocky Branch built?

It was built in 1950, making it 75 years old in 2025.

What condition is Sc 48 over Rocky 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 December 2023.

How much traffic does Sc 48 over Rocky Branch carry?

About 23,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Sc 48 over Rocky Branch?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 150 ft wide.

Who owns Sc 48 over Rocky Branch?

It is owned by the State Highway Agency.