I77
I77 in 0.7 MI.S.JCT I277&Nc16, Mecklenburg County, North Carolina received a condition grade of F (0/100). Built in 1972, the bridge carries 133K vehicles daily on I77 over Irwin Creek. It is classified as structurally deficient.
Component Ratings
The riding surface — evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
I77 is a 54-year-old bridge located 0.7 MI.S.JCT I277&Nc16 in Mecklenburg County, North Carolina. The bridge carries I77 over Irwin Creek with 12 traffic lanes, handling approximately 133K vehicles per day. Built in 1972, the structure spans 27.1 meters.
The bridge received a Condition Grade of F (0/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 0/9 (serious), and substructure 0/9 (serious). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below — this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I77 has a Condition Score of 0/100 (Grade F). Its deck is rated 0/9, superstructure 0/9, and substructure 0/9 on the NBI scale. The bridge is classified as structurally deficient.
I77 was built in 1972, making it 54 years old. The average bridge age in the United States is 48 years.
I77 carries approximately 133K vehicles per day (average daily traffic). The bridge has 12 traffic lanes. It is 27.1 meters long and located on I77 in 0.7 MI.S.JCT I277&Nc16, Mecklenburg County, North Carolina.
Yes, I77 is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
I77 is located 0.7 MI.S.JCT I277&Nc16 in Mecklenburg County, North Carolina. The bridge carries I77 over Irwin Creek. Its coordinates are 35.239233, -80.852417. It is maintained by State Highway Agency.
I77 carries I77 over Irwin Creek. The bridge is 27.1 meters long and was built in 1972.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.