US Bridges

S-4-97 over Six & Twenty Creek

Poor

Anderson County, South Carolina · 7.7MI N Anderson · Structure no. 000000000007194

Built
1979
46 years old
Condition
Poor
inspected January 2025
Type
Slab
Concrete
Length
120 ft
8 main spans
Daily traffic
450
2023 count
Owner
State
State Highway Agency

About this bridge

S-4-97 over Six & Twenty Creek is a concrete slab carrying S-4-97 over Six & Twenty Creek in Anderson County, South Carolina. It was built in 1979, so it is 46 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 450 vehicles a day, roughly 8% of them trucks, projected to reach 554 by 2043. The structure is 120 ft (36.6 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS-4-97
CrossesSix & Twenty Creek
Location7.7MI N Anderson
RouteState Highway 97
Coordinates34.61474, -82.64527
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.5 US tons
Inventory rating16.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans8
Design loadH 15
Structure length120 ft (36.6 m)
Longest span15 ft (4.6 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2023)
Projected traffic554 by 2043
Trucks8%
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 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-4-97 over Six & Twenty Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is S-4-97 over Six & Twenty Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2025.

How much traffic does S-4-97 over Six & Twenty Creek carry?

About 450 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is S-4-97 over Six & Twenty Creek?

The structure is 120 ft (36.6 m) long with a longest span of 15 ft (4.6 m) and a deck 33 ft wide.

Who owns S-4-97 over Six & Twenty Creek?

It is owned by the State Highway Agency.