US Bridges

I85 over US321

Good

Gaston County, North Carolina · 1.5 Mi. N. Jct. US29 · Structure no. 000000000710120

Built
1962
63 years old, rebuilt 1994
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
341 ft
6 main spans
Daily traffic
117,000
2022 count
Owner
State
State Highway Agency

About this bridge

I85 over US321 is a steel stringer/multi-beam or girder carrying I85 over US321 in Gaston County, North Carolina. It was built in 1962 and reconstructed in 1994, so it is 63 years old, older 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 117,000 vehicles a day, roughly 16% of them trucks, projected to reach 234,000 by 2040. The structure is 341 ft (103.9 m) long and 123 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI85
CrossesUS321
Location1.5 Mi. N. Jct. US29
RouteInterstate 85
Coordinates35.28358, -81.18803
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.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating37.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length341 ft (103.9 m)
Longest span74 ft (22.5 m)
Deck width123 ft (37.5 m)
Roadway width117 ft (35.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic117,000 (2022)
Projected traffic234,000 by 2040
Trucks16%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I85 over US321 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1994.

What condition is I85 over US321 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 October 2024.

How much traffic does I85 over US321 carry?

About 117,000 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is I85 over US321?

The structure is 341 ft (103.9 m) long with a longest span of 74 ft (22.5 m) and a deck 123 ft wide.

Who owns I85 over US321?

It is owned by the State Highway Agency.