US Bridges

I277 Sbl over US29 & NC49

Fair

Mecklenburg County, North Carolina · 0.7 Mi. N. Jct. I77 · Structure no. 000000001190510

Built
1987
38 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
115 ft
2 main spans
Daily traffic
44,250
2020 count
Owner
State
State Highway Agency

About this bridge

I277 Sbl over US29 & NC49 is a steel stringer/multi-beam or girder carrying I277 Sbl over US29 & NC49 in Mecklenburg County, North Carolina. It was built in 1987, so it is 38 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 44,250 vehicles a day, roughly 16% of them trucks, projected to reach 88,500 by 2040. The structure is 115 ft (35 m) long and 88 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI277 Sbl
CrossesUS29 & NC49
Location0.7 Mi. N. Jct. I77
RouteInterstate 277
CountyMecklenburg County
StateNorth Carolina
Coordinates35.224, -80.85343
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.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating67.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length115 ft (35 m)
Longest span84 ft (25.6 m)
Deck width88 ft (26.7 m)
Roadway width85 ft (25.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,250 (2020)
Projected traffic88,500 by 2040
Trucks16%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I277 Sbl over US29 & NC49 built?

It was built in 1987, making it 38 years old in 2025.

What condition is I277 Sbl over US29 & NC49 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 August 2024.

How much traffic does I277 Sbl over US29 & NC49 carry?

About 44,250 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is I277 Sbl over US29 & NC49?

The structure is 115 ft (35 m) long with a longest span of 84 ft (25.6 m) and a deck 88 ft wide.

Who owns I277 Sbl over US29 & NC49?

It is owned by the State Highway Agency.