US Bridges

L-40-891 over Rocky Branch

Fair

Richland County, South Carolina · City of Columbia · Structure no. 000000000000073

Built
1910
115 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
225
2023 count
Owner
County
County Highway Agency

About this bridge

L-40-891 over Rocky Branch is a concrete culvert carrying L-40-891 over Rocky Branch in Richland County, South Carolina. It was built in 1910, so it is 115 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 6 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 225 vehicles a day, roughly 5% of them trucks, projected to reach 288 by 2043. The structure is 21 ft (6.4 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesL-40-891
CrossesRocky Branch
LocationCity of Columbia
RouteCounty Highway 891
CountyRichland County
StateSouth Carolina
Coordinates33.98928, -81.02762
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
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 rating43.5 US tons
Inventory rating26.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width30 ft (9.1 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2023)
Projected traffic288 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was L-40-891 over Rocky Branch built?

It was built in 1910, making it 115 years old in 2025.

What condition is L-40-891 over Rocky Branch 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 January 2025.

How much traffic does L-40-891 over Rocky Branch carry?

About 225 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is L-40-891 over Rocky Branch?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 30 ft wide.

Who owns L-40-891 over Rocky Branch?

It is owned by the County Highway Agency.