I277 & NC16
I277 & NC16 in 1.22 MI.N.JCT.Us74 Wbl, Mecklenburg County, North Carolina received a condition grade of B (60/100). Built in 1971, the bridge carries 127K vehicles daily on I277 & NC16 over Us29/Nc49 (Graham ST.). It is classified as structurally deficient.
I277 & NC16 carries a B on the BridgeSafety Condition Score with 60/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 1971 and is now 55 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. I277 & NC16 carries an average daily traffic count of 127,000 vehicles, with 9 lane(s) crossing Us29/Nc49 (Graham ST.). The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
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
I277 & NC16 is a 55-year-old bridge located 1.22 MI.N.JCT.Us74 Wbl in Mecklenburg County, North Carolina. The bridge carries I277 & NC16 over Us29/Nc49 (Graham ST.) with 9 traffic lanes, handling approximately 127K vehicles per day. Built in 1971, the structure spans 57.9 meters.
The bridge received a Condition Grade of B (60/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 6/9 (fair), and substructure 4/9 (poor). 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
I277 & NC16 has a Condition Score of 60/100 (Grade B). Its deck is rated 7/9, superstructure 6/9, and substructure 4/9 on the NBI scale. The bridge is classified as structurally deficient.
I277 & NC16 was built in 1971, making it 55 years old. The average bridge age in the United States is 48 years.
I277 & NC16 carries approximately 127K vehicles per day (average daily traffic). The bridge has 9 traffic lanes. It is 57.9 meters long and located on I277 & NC16 in 1.22 MI.N.JCT.Us74 Wbl, Mecklenburg County, North Carolina.
Yes, I277 & NC16 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.
I277 & NC16 is located 1.22 MI.N.JCT.Us74 Wbl in Mecklenburg County, North Carolina. The bridge carries I277 & NC16 over Us29/Nc49 (Graham ST.). Its coordinates are 35.236094, -80.839325. It is maintained by State Highway Agency.
I277 & NC16 carries I277 & NC16 over Us29/Nc49 (Graham ST.). The bridge is 57.9 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.
Source: FHWA National Bridge Inventory, 2026.