US Bridges

Sc 93 EB over Seneca River

Good

Oconee County, South Carolina · 1.0 MI W of Clemson · Structure no. 000000000003716

Built
1961
64 years old, rebuilt 2004
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
700 ft
10 main spans
Daily traffic
6,200
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 93 EB over Seneca River is a prestressed concrete stringer/multi-beam or girder carrying Sc 93 EB over Seneca River in Oconee County, South Carolina. It was built in 1961 and reconstructed in 2004, so it is 64 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,200 vehicles a day, roughly 4% of them trucks, projected to reach 8,742 by 2043. The structure is 700 ft (213.4 m) long and 37 ft wide.

CarriesSc 93 EB
CrossesSeneca River
Location1.0 MI W of Clemson
RouteState Highway 4
Coordinates34.68109, -82.85636
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating13.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans10
Design loadH 15
Structure length700 ft (213.4 m)
Longest span70 ft (21.3 m)
Deck width37 ft (11.3 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,200 (2023)
Projected traffic8,742 by 2043
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.5 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sc 93 EB over Seneca River built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2004.

What condition is Sc 93 EB over Seneca River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does Sc 93 EB over Seneca River carry?

About 6,200 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Sc 93 EB over Seneca River?

The structure is 700 ft (213.4 m) long with a longest span of 70 ft (21.3 m) and a deck 37 ft wide.

Who owns Sc 93 EB over Seneca River?

It is owned by the State Highway Agency.