US Bridges

L-40-4699 over Smith Branch

Good

Richland County, South Carolina · 3 MI N of Columbia · Structure no. 000000000006578

Built
1974
51 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
225
2023 count
Owner
County
County Highway Agency

About this bridge

L-40-4699 over Smith Branch is a concrete culvert carrying L-40-4699 over Smith Branch in Richland 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 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 225 vehicles a day, roughly 5% of them trucks, projected to reach 288 by 2043. The structure is 25 ft (7.6 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesL-40-4699
CrossesSmith Branch
Location3 MI N of Columbia
RouteCounty Highway 4699
Coordinates34.03856, -81.01863
Functional classUrban Local

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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating34.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width61 ft (18.6 m)
Roadway width36 ft (11 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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was L-40-4699 over Smith Branch built?

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

What condition is L-40-4699 over Smith 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 November 2024.

How much traffic does L-40-4699 over Smith Branch carry?

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

How long is L-40-4699 over Smith Branch?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 61 ft wide.

Who owns L-40-4699 over Smith Branch?

It is owned by the County Highway Agency.