US Bridges

Sc 7/COSGROVE Ave over S-39 & S-163 & RR CSXT

Good

Charleston County, South Carolina · North Charleston · Structure no. 000000000002142

Built
2016
9 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
860 ft
6 main spans
Daily traffic
20,400
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 7/COSGROVE Ave over S-39 & S-163 & RR CSXT is a steel continuous stringer/multi-beam or girder carrying Sc 7/COSGROVE Ave over S-39 & S-163 & RR CSXT in Charleston County, South Carolina. It was built in 2016, so it is 9 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 20,400 vehicles a day, roughly 5% of them trucks, projected to reach 29,172 by 2043. The structure is 860 ft (262 m) long and 72 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSc 7/COSGROVE Ave
CrossesS-39 & S-163 & RR CSXT
LocationNorth Charleston
RouteState Highway 7
Coordinates32.85169, -79.97866
Functional classUrban Other Principal Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length860 ft (262 m)
Longest span170 ft (51.8 m)
Deck width72 ft (21.9 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,400 (2023)
Projected traffic29,172 by 2043
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sc 7/COSGROVE Ave over S-39 & S-163 & RR CSXT built?

It was built in 2016, making it 9 years old in 2025.

What condition is Sc 7/COSGROVE Ave over S-39 & S-163 & RR CSXT 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 August 2024.

How much traffic does Sc 7/COSGROVE Ave over S-39 & S-163 & RR CSXT carry?

About 20,400 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Sc 7/COSGROVE Ave over S-39 & S-163 & RR CSXT?

The structure is 860 ft (262 m) long with a longest span of 170 ft (51.8 m) and a deck 72 ft wide.

Who owns Sc 7/COSGROVE Ave over S-39 & S-163 & RR CSXT?

It is owned by the State Highway Agency.