US Bridges

I485 Nbl Ramp over Mallard Creek

Fair

Mecklenburg County, North Carolina · 0.2 Mi. S. Jct. US29 · Structure no. 000000001190941

Built
1999
26 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
531 ft
7 main spans
Daily traffic
5,600
2021 count
Owner
State
State Highway Agency

About this bridge

I485 Nbl Ramp over Mallard Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying I485 Nbl Ramp over Mallard Creek in Mecklenburg County, North Carolina. It was built in 1999, so it is 26 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,600 vehicles a day, roughly 16% of them trucks, projected to reach 11,200 by 2040. The structure is 531 ft (161.8 m) long and 29 ft wide.

Location

Open in Google Maps
CarriesI485 Nbl Ramp
CrossesMallard Creek
Location0.2 Mi. S. Jct. US29
RouteInterstate 485
CountyMecklenburg County
StateNorth Carolina
Coordinates35.33149, -80.71899
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20 + Mod
Structure length531 ft (161.8 m)
Longest span83 ft (25.2 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,600 (2021)
Projected traffic11,200 by 2040
Trucks16%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 I485 Nbl Ramp over Mallard Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is I485 Nbl Ramp over Mallard Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does I485 Nbl Ramp over Mallard Creek carry?

About 5,600 vehicles per day (2021 count), of which roughly 16% are trucks.

How long is I485 Nbl Ramp over Mallard Creek?

The structure is 531 ft (161.8 m) long with a longest span of 83 ft (25.2 m) and a deck 29 ft wide.

Who owns I485 Nbl Ramp over Mallard Creek?

It is owned by the State Highway Agency.