I77
I77 in 0.55 MI. N. JCT. Nc16, Mecklenburg County, North Carolina received a condition grade of F (0/100). Built in 1971, the bridge carries 138K 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 55-year-old bridge located 0.55 MI. N. JCT. Nc16 in Mecklenburg County, North Carolina. The bridge carries I77 over Irwin Creek with 8 traffic lanes, handling approximately 138K vehicles per day. Built in 1971, the structure spans 22.8 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 1971, making it 55 years old. The average bridge age in the United States is 48 years.
I77 carries approximately 138K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 22.8 meters long and located on I77 in 0.55 MI. N. JCT. 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 0.55 MI. N. JCT. Nc16 in Mecklenburg County, North Carolina. The bridge carries I77 over Irwin Creek. Its coordinates are 35.252328, -80.843778. It is maintained by State Highway Agency.
I77 carries I77 over Irwin Creek. The bridge is 22.8 meters long and was built in 1971.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.