I-85 NB SB AND CD
I-85 NB SB AND CD in 3 MI N Of Duluth, Gwinnett County, Georgia received a condition grade of A (81/100). Built in 1999, the bridge carries 172K vehicles daily on I-85 NB SB AND CD over Sugarloaf Parkway.
I-85 NB SB AND CD carries an A on the BridgeSafety Condition Score with 81/100. Deck, superstructure, and substructure ratings all sit in the better tier of the FHWA NBI distribution. The bridge is structurally sound by federal standards.
The bridge was built in 1999, making it 27 years old — past the early-life period but still well within typical service life. Routine inspections and modest repair work are normal for bridges in this age band. I-85 NB SB AND CD carries an average daily traffic count of 172,000 vehicles, with 16 lane(s) crossing Sugarloaf Parkway. 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
I-85 NB SB AND CD is a 27-year-old bridge located 3 MI N Of Duluth in Gwinnett County, Georgia. The bridge carries I-85 NB SB AND CD over Sugarloaf Parkway with 16 traffic lanes, handling approximately 172K vehicles per day. Built in 1999, the structure spans 49.4 meters.
The bridge received a Condition Grade of A (81/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 8/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-85 NB SB AND CD has a Condition Score of 81/100 (Grade A). Its deck is rated 7/9, superstructure 8/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-85 NB SB AND CD was built in 1999, making it 27 years old. The average bridge age in the United States is 48 years.
I-85 NB SB AND CD carries approximately 172K vehicles per day (average daily traffic). The bridge has 16 traffic lanes. It is 49.4 meters long and located on I-85 NB SB AND CD in 3 MI N Of Duluth, Gwinnett County, Georgia.
No, I-85 NB SB AND CD is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
I-85 NB SB AND CD is located 3 MI N Of Duluth in Gwinnett County, Georgia. The bridge carries I-85 NB SB AND CD over Sugarloaf Parkway. Its coordinates are 33.987628, -84.084100. It is maintained by State Highway Agency.
I-85 NB SB AND CD carries I-85 NB SB AND CD over Sugarloaf Parkway. The bridge is 49.4 meters long and was built in 1999.
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.