US Bridges

US 15 over Langdale Branch

Fair

Colleton County, South Carolina · 4 MI N of Walterboro · Structure no. 000000000000502

Built
1931
94 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
2,900
2023 count
Owner
State
State Highway Agency

About this bridge

US 15 over Langdale Branch is a concrete culvert carrying US 15 over Langdale Branch in Colleton County, South Carolina. It was built in 1931, so it is 94 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 2,900 vehicles a day, roughly 12% of them trucks, projected to reach 4,234 by 2043. The structure is 34 ft (10.4 m) long and 57 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 15
CrossesLangdale Branch
Location4 MI N of Walterboro
RouteU.S. Route 15
CountyColleton County
StateSouth Carolina
Coordinates32.97707, -80.6353
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating31.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width57 ft (17.4 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2023)
Projected traffic4,234 by 2043
Trucks12%
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

OwnerState Highway Agency
Maintained byState 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 US 15 over Langdale Branch built?

It was built in 1931, making it 94 years old in 2025.

What condition is US 15 over Langdale 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 March 2024.

How much traffic does US 15 over Langdale Branch carry?

About 2,900 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US 15 over Langdale Branch?

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m) and a deck 57 ft wide.

Who owns US 15 over Langdale Branch?

It is owned by the State Highway Agency.