US Bridges

S-4-71 over Lake Hartwell

FairPosted for load

Anderson County, South Carolina · 8.8MI NW Anderson · Structure no. 000000000003797

Built
1962
63 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete
Length
400 ft
8 main spans
Daily traffic
2,400
2023 count
Owner
State
State Highway Agency

About this bridge

S-4-71 over Lake Hartwell is a concrete tee beam carrying S-4-71 over Lake Hartwell in Anderson County, South Carolina. It was built in 1962, so it is 63 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 2,400 vehicles a day, roughly 8% of them trucks, projected to reach 4,392 by 2043. The structure is 400 ft (121.9 m) long and 30 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesS-4-71
CrossesLake Hartwell
Location8.8MI NW Anderson
RouteState Highway 71
CountyAnderson County
StateSouth Carolina
Coordinates34.56315, -82.78588
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 protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 15
Structure length400 ft (121.9 m)
Longest span50 ft (15.2 m)
Deck width30 ft (9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2023)
Projected traffic4,392 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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-4-71 over Lake Hartwell built?

It was built in 1962, making it 63 years old in 2025.

What condition is S-4-71 over Lake Hartwell 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-4-71 over Lake Hartwell carry?

About 2,400 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is S-4-71 over Lake Hartwell?

The structure is 400 ft (121.9 m) long with a longest span of 50 ft (15.2 m) and a deck 30 ft wide.

Who owns S-4-71 over Lake Hartwell?

It is owned by the State Highway Agency.