US Bridges

C-16-735 over Lake Swamp

FairPosted for load

Darlington County, South Carolina · 7.3 MI S Hartsville · Structure no. 000000000009811

Built
1949
76 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete
Length
41 ft
3 main spans
Daily traffic
200
2023 count
Owner
County
County Highway Agency

About this bridge

C-16-735 over Lake Swamp is a concrete slab carrying C-16-735 over Lake Swamp in Darlington County, South Carolina. It was built in 1949, so it is 76 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. Its operating status is: posted for load restriction.

It carries about 200 vehicles a day, roughly 5% of them trucks, projected to reach 256 by 2043. The structure is 41 ft (12.5 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesC-16-735
CrossesLake Swamp
Location7.3 MI S Hartsville
RouteCounty Highway 735
CountyDarlington County
StateSouth Carolina
Coordinates34.2707, -80.05191
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.8 US tons
Inventory rating22.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 10
Structure length41 ft (12.5 m)
Longest span14 ft (4.4 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic256 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 C-16-735 over Lake Swamp built?

It was built in 1949, making it 76 years old in 2025.

What condition is C-16-735 over Lake Swamp 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 November 2023.

How much traffic does C-16-735 over Lake Swamp carry?

About 200 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is C-16-735 over Lake Swamp?

The structure is 41 ft (12.5 m) long with a longest span of 14 ft (4.4 m) and a deck 26 ft wide.

Who owns C-16-735 over Lake Swamp?

It is owned by the County Highway Agency.