US Bridges

I-77 & Ramp On/Off over Unnamed_stream

Good

Richland County, South Carolina · 7 MI NE of Columbia · Structure no. 000000000008911

Built
1995
30 years old
Condition
Good
inspected February 2024
Type
Culvert
Concrete
Length
22 ft
3 main spans
Daily traffic
87,400
2023 count
Owner
State
State Highway Agency

About this bridge

I-77 & Ramp On/Off over Unnamed_stream is a concrete culvert carrying I-77 & Ramp On/Off over Unnamed_stream in Richland County, South Carolina. It was built in 1995, so it is 30 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 87,400 vehicles a day, roughly 16% of them trucks, projected to reach 108,376 by 2043. The structure is 22 ft (6.7 m) long and 150 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-77 & Ramp On/Off
CrossesUnnamed_stream
Location7 MI NE of Columbia
RouteInterstate 77
CountyRichland County
StateSouth Carolina
Coordinates34.055, -80.9225
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length22 ft (6.7 m)
Longest span8 ft (2.4 m)
Deck width150 ft (45.7 m)
Roadway width132 ft (40.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic87,400 (2023)
Projected traffic108,376 by 2043
Trucks16%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 & Ramp On/Off over Unnamed_stream built?

It was built in 1995, making it 30 years old in 2025.

What condition is I-77 & Ramp On/Off over Unnamed_stream 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 February 2024.

How much traffic does I-77 & Ramp On/Off over Unnamed_stream carry?

About 87,400 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I-77 & Ramp On/Off over Unnamed_stream?

The structure is 22 ft (6.7 m) long with a longest span of 8 ft (2.4 m) and a deck 150 ft wide.

Who owns I-77 & Ramp On/Off over Unnamed_stream?

It is owned by the State Highway Agency.