US Bridges

S-16-16 over Lynches River

Fair

Darlington County, South Carolina · 7MI W Hartsville · Structure no. 000000000006648

Built
1975
50 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
600 ft
20 main spans
Daily traffic
900
2023 count
Owner
State
State Highway Agency

About this bridge

S-16-16 over Lynches River is a concrete slab carrying S-16-16 over Lynches River in Darlington County, South Carolina. It was built in 1975, so it is 50 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 900 vehicles a day, roughly 10% of them trucks, projected to reach 1,314 by 2043. The structure is 600 ft (182.9 m) long and 35 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesS-16-16
CrossesLynches River
Location7MI W Hartsville
RouteState Highway 16
CountyDarlington County
StateSouth Carolina
Coordinates34.32671, -80.24515
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating32.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans20
Design loadHS 15
Structure length600 ft (182.9 m)
Longest span30 ft (9.1 m)
Deck width35 ft (10.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2023)
Projected traffic1,314 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 S-16-16 over Lynches River built?

It was built in 1975, making it 50 years old in 2025.

What condition is S-16-16 over Lynches River 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 S-16-16 over Lynches River carry?

About 900 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is S-16-16 over Lynches River?

The structure is 600 ft (182.9 m) long with a longest span of 30 ft (9.1 m) and a deck 35 ft wide.

Who owns S-16-16 over Lynches River?

It is owned by the State Highway Agency.