I-85
I-85 in 3.6 MI S Of Chamblee, DeKalb County, Georgia received a condition grade of F (0/100). Built in 1956, the bridge carries 206K vehicles daily on I-85 over N. Fork Ptree Crk Trib. 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
I-85 is a 70-year-old bridge located 3.6 MI S Of Chamblee in DeKalb County, Georgia. The bridge carries I-85 over N. Fork Ptree Crk Trib with 17 traffic lanes, handling approximately 206K vehicles per day. Built in 1956 and reconstructed in 1981, the structure spans 7.3 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
I-85 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.
I-85 was built in 1956 and reconstructed in 1981, making it 70 years old. The average bridge age in the United States is 48 years.
I-85 carries approximately 206K vehicles per day (average daily traffic). The bridge has 17 traffic lanes. It is 7.3 meters long and located on I-85 in 3.6 MI S Of Chamblee, DeKalb County, Georgia.
Yes, I-85 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.
I-85 is located 3.6 MI S Of Chamblee in DeKalb County, Georgia. The bridge carries I-85 over N. Fork Ptree Crk Trib. Its coordinates are 33.840461, -84.311897. It is maintained by State Highway Agency.
I-85 carries I-85 over N. Fork Ptree Crk Trib. The bridge is 7.3 meters long and was built in 1956, with reconstruction in 1981.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.