US Bridges

SR1164 over I77 & US21

Fair

Mecklenburg County, North Carolina · 1.0 Mi. E. Jct. SR1138 · Structure no. 000000001190136

Built
1966
59 years old, rebuilt 2013
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
227 ft
4 main spans
Daily traffic
17,000
2021 count
Owner
State
State Highway Agency

About this bridge

SR1164 over I77 & US21 is a steel stringer/multi-beam or girder carrying SR1164 over I77 & US21 in Mecklenburg County, North Carolina. It was built in 1966 and reconstructed in 2013, so it is 59 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 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 17,000 vehicles a day, roughly 7% of them trucks, projected to reach 34,000 by 2040. The structure is 227 ft (69.1 m) long and 53 ft wide.

Location

Open in Google Maps
CarriesSR1164
CrossesI77 & US21
Location1.0 Mi. E. Jct. SR1138
RouteState Highway 1164
CountyMecklenburg County
StateNorth Carolina
Coordinates35.14784, -80.89659
Functional classUrban Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating49.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length227 ft (69.1 m)
Longest span62 ft (18.8 m)
Deck width53 ft (16.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,000 (2021)
Projected traffic34,000 by 2040
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 SR1164 over I77 & US21 built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2013.

What condition is SR1164 over I77 & US21 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 November 2023.

How much traffic does SR1164 over I77 & US21 carry?

About 17,000 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is SR1164 over I77 & US21?

The structure is 227 ft (69.1 m) long with a longest span of 62 ft (18.8 m) and a deck 53 ft wide.

Who owns SR1164 over I77 & US21?

It is owned by the State Highway Agency.