US Bridges

US 76 over Seneca River

Fair

Pickens County, South Carolina · 1MI NW of Clemson · Structure no. 000000000002813

Built
1958
67 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
790 ft
4 main spans
Daily traffic
32,400
2023 count
Owner
State
State Highway Agency

About this bridge

US 76 over Seneca River is a steel continuous stringer/multi-beam or girder carrying US 76 over Seneca River in Pickens County, South Carolina. It was built in 1958, so it is 67 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 32,400 vehicles a day, roughly 4% of them trucks, projected to reach 40,176 by 2043. The structure is 790 ft (240.8 m) long and 66 ft wide.

CarriesUS 76
CrossesSeneca River
Location1MI NW of Clemson
RouteU.S. Route 76
Coordinates34.69279, -82.85061
Functional classUrban Other Principal Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating33.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4 (+10 approach)
Design loadH 20
Structure length790 ft (240.8 m)
Longest span80 ft (24.4 m)
Deck width66 ft (20.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,400 (2023)
Projected traffic40,176 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 76 over Seneca River built?

It was built in 1958, making it 67 years old in 2025.

What condition is US 76 over Seneca 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 April 2024.

How much traffic does US 76 over Seneca River carry?

About 32,400 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US 76 over Seneca River?

The structure is 790 ft (240.8 m) long with a longest span of 80 ft (24.4 m) and a deck 66 ft wide.

Who owns US 76 over Seneca River?

It is owned by the State Highway Agency.