US Bridges

I485 Sbl over Southern Rr.

Good

Mecklenburg County, North Carolina · 0.7 Mi. S. Jct. US29 · Structure no. 000000001190829

Built
2006
19 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
386 ft
2 main spans
Daily traffic
54,000
2020 count
Owner
State
State Highway Agency

About this bridge

I485 Sbl over Southern Rr. is a steel continuous stringer/multi-beam or girder carrying I485 Sbl over Southern Rr. in Mecklenburg County, North Carolina. It was built in 2006, so it is 19 years old, younger than the North Carolina average of 38.7 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 54,000 vehicles a day, roughly 16% of them trucks, projected to reach 108,000 by 2040. The structure is 386 ft (117.6 m) long and 86 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI485 Sbl
CrossesSouthern Rr.
Location0.7 Mi. S. Jct. US29
RouteInterstate 485
Coordinates35.22959, -80.97089
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating43 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length386 ft (117.6 m)
Longest span129 ft (39.3 m)
Deck width86 ft (26.1 m)
Roadway width82 ft (25.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,000 (2020)
Projected traffic108,000 by 2040
Trucks16%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I485 Sbl over Southern Rr. built?

It was built in 2006, making it 19 years old in 2025.

What condition is I485 Sbl over Southern Rr. 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 January 2024.

How much traffic does I485 Sbl over Southern Rr. carry?

About 54,000 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is I485 Sbl over Southern Rr.?

The structure is 386 ft (117.6 m) long with a longest span of 129 ft (39.3 m) and a deck 86 ft wide.

Who owns I485 Sbl over Southern Rr.?

It is owned by the State Highway Agency.