US Bridges

I-77 NB over Congaree River Ovf #3

Good

Lexington County, South Carolina · 3 MI SE Springdale · Structure no. 000000000007812

Built
1984
41 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete Continuous
Length
780 ft
26 main spans
Daily traffic
45,550
2023 count
Owner
State
State Highway Agency

About this bridge

I-77 NB over Congaree River Ovf #3 is a concrete continuous slab carrying I-77 NB over Congaree River Ovf #3 in Lexington County, South Carolina. It was built in 1984, so it is 41 years old, younger 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 45,550 vehicles a day, roughly 9% of them trucks, projected to reach 56,482 by 2043. The structure is 780 ft (237.7 m) long and 72 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-77 NB
CrossesCongaree River Ovf #3
Location3 MI SE Springdale
RouteInterstate 77
Coordinates33.92953, -81.05064
Functional classUrban Principal Arterial - Interstate

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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.3 US tons
Inventory rating72.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans26
Design loadHS 20 + Mod
Structure length780 ft (237.7 m)
Longest span90 ft (27.4 m)
Deck width72 ft (21.8 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45,550 (2023)
Projected traffic56,482 by 2043
Trucks9%
Lanes on structure3
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-77 NB over Congaree River Ovf #3 built?

It was built in 1984, making it 41 years old in 2025.

What condition is I-77 NB over Congaree River Ovf #3 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 November 2023.

How much traffic does I-77 NB over Congaree River Ovf #3 carry?

About 45,550 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-77 NB over Congaree River Ovf #3?

The structure is 780 ft (237.7 m) long with a longest span of 90 ft (27.4 m) and a deck 72 ft wide.

Who owns I-77 NB over Congaree River Ovf #3?

It is owned by the State Highway Agency.