US Bridges

S-14-257 over Trib to Lake Marion

Fair

Clarendon County, South Carolina · 7MI SW Summerton · Structure no. 000000000005689

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Channel Beam
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
175
2023 count
Owner
State
State Highway Agency

About this bridge

S-14-257 over Trib to Lake Marion is a prestressed concrete channel beam carrying S-14-257 over Trib to Lake Marion in Clarendon County, South Carolina. It was built in 1970, so it is 55 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 5 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 175 vehicles a day, roughly 5% of them trucks, projected to reach 224 by 2043. The structure is 60 ft (18.3 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesS-14-257
CrossesTrib to Lake Marion
Location7MI SW Summerton
RouteState Highway 257
CountyClarendon County
StateSouth Carolina
Coordinates33.55334, -80.42782
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating29.3 US tons
Inventory rating17.5 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1 (+2 approach)
Design loadH 10
Structure length60 ft (18.3 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2023)
Projected traffic224 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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-14-257 over Trib to Lake Marion built?

It was built in 1970, making it 55 years old in 2025.

What condition is S-14-257 over Trib to Lake Marion 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 October 2024.

How much traffic does S-14-257 over Trib to Lake Marion carry?

About 175 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-14-257 over Trib to Lake Marion?

The structure is 60 ft (18.3 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns S-14-257 over Trib to Lake Marion?

It is owned by the State Highway Agency.