US Bridges

I77 & US21 Sbl over Sugar Creek

Good

Mecklenburg County, North Carolina · 0.87 Mi. S. Jct. SR1164 · Structure no. 000000001190075

Built
1993
32 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
180 ft
3 main spans
Daily traffic
34,750
2020 count
Owner
State
State Highway Agency

About this bridge

I77 & US21 Sbl over Sugar Creek is a steel continuous stringer/multi-beam or girder carrying I77 & US21 Sbl over Sugar Creek in Mecklenburg County, North Carolina. It was built in 1993, so it is 32 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 34,750 vehicles a day, roughly 16% of them trucks, projected to reach 69,500 by 2040. The structure is 180 ft (54.8 m) long and 73 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI77 & US21 Sbl
CrossesSugar Creek
Location0.87 Mi. S. Jct. SR1164
RouteInterstate 77
Coordinates35.12728, -80.9165
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98 US tons
Inventory rating58 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length180 ft (54.8 m)
Longest span64 ft (19.5 m)
Deck width73 ft (22.1 m)
Roadway width70 ft (21.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,750 (2020)
Projected traffic69,500 by 2040
Trucks16%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I77 & US21 Sbl over Sugar Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is I77 & US21 Sbl over Sugar Creek 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 2023.

How much traffic does I77 & US21 Sbl over Sugar Creek carry?

About 34,750 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is I77 & US21 Sbl over Sugar Creek?

The structure is 180 ft (54.8 m) long with a longest span of 64 ft (19.5 m) and a deck 73 ft wide.

Who owns I77 & US21 Sbl over Sugar Creek?

It is owned by the State Highway Agency.