US Bridges

S-37-37 over Seneca River

Fair

Oconee County, South Carolina · 2 MI S Clemson · Structure no. 000000000003943

Built
1962
63 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
539 ft
7 main spans
Daily traffic
6,500
2023 count
Owner
State
State Highway Agency

About this bridge

S-37-37 over Seneca River is a prestressed concrete stringer/multi-beam or girder carrying S-37-37 over Seneca River in Oconee 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.

It carries about 6,500 vehicles a day, roughly 3% of them trucks, projected to reach 9,165 by 2043. The structure is 539 ft (164.3 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS-37-37
CrossesSeneca River
Location2 MI S Clemson
RouteState Highway 37
Coordinates34.65336, -82.85121
Functional classUrban 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 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 evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating27.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 15
Structure length539 ft (164.3 m)
Longest span77 ft (23.5 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,500 (2023)
Projected traffic9,165 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.8 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-37-37 over Seneca River built?

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

What condition is S-37-37 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 March 2023.

How much traffic does S-37-37 over Seneca River carry?

About 6,500 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S-37-37 over Seneca River?

The structure is 539 ft (164.3 m) long with a longest span of 77 ft (23.5 m) and a deck 28 ft wide.

Who owns S-37-37 over Seneca River?

It is owned by the State Highway Agency.