US Bridges

I-20 EB over Wateree Swp Overflow (2)

Fair

Kershaw County, South Carolina · 2 MI S of Camden · Structure no. 000000000005781

Built
1970
55 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
750 ft
25 main spans
Daily traffic
22,100
2023 count
Owner
State
State Highway Agency

About this bridge

I-20 EB over Wateree Swp Overflow (2) is a concrete slab carrying I-20 EB over Wateree Swp Overflow (2) in Kershaw County, South Carolina. It was built in 1970, so it is 55 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 22,100 vehicles a day, roughly 16% of them trucks, projected to reach 35,360 by 2043. The structure is 750 ft (228.6 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-20 EB
CrossesWateree Swp Overflow (2)
Location2 MI S of Camden
RouteInterstate 20
Coordinates34.21839, -80.60714
Functional classRural Principal Arterial - Interstate

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans25
Design loadHS 20
Structure length750 ft (228.6 m)
Longest span30 ft (9.1 m)
Deck width43 ft (13.1 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,100 (2023)
Projected traffic35,360 by 2043
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-20 EB over Wateree Swp Overflow (2) built?

It was built in 1970, making it 55 years old in 2025.

What condition is I-20 EB over Wateree Swp Overflow (2) 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 May 2024.

How much traffic does I-20 EB over Wateree Swp Overflow (2) carry?

About 22,100 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I-20 EB over Wateree Swp Overflow (2)?

The structure is 750 ft (228.6 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.

Who owns I-20 EB over Wateree Swp Overflow (2)?

It is owned by the State Highway Agency.