US Bridges

L-40-949 over Lake Kathrine

Good

Richland County, South Carolina · 4 MI E of Columbia · Structure no. 000000000008664

Built
1993
32 years old
Condition
Good
inspected January 2025
Type
Slab
Concrete Continuous
Length
90 ft
3 main spans
Daily traffic
1,300
2023 count
Owner
County
County Highway Agency

About this bridge

L-40-949 over Lake Kathrine is a concrete continuous slab carrying L-40-949 over Lake Kathrine in Richland County, South Carolina. It was built in 1993, so it is 32 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 1,300 vehicles a day, roughly 5% of them trucks, projected to reach 1,664 by 2043. The structure is 90 ft (27.4 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesL-40-949
CrossesLake Kathrine
Location4 MI E of Columbia
RouteCounty Highway 949
Coordinates34.00768, -80.96117
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating41.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span30 ft (9.1 m)
Deck width36 ft (11.1 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2023)
Projected traffic1,664 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-40-949 over Lake Kathrine built?

It was built in 1993, making it 32 years old in 2025.

What condition is L-40-949 over Lake Kathrine 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 January 2025.

How much traffic does L-40-949 over Lake Kathrine carry?

About 1,300 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is L-40-949 over Lake Kathrine?

The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 36 ft wide.

Who owns L-40-949 over Lake Kathrine?

It is owned by the County Highway Agency.