I-65
I-65 in 04.16 N I-70, Marion County, Indiana received a condition grade of B (74/100). Built in 1968, the bridge carries 124K vehicles daily on I-65 over 21st Street.
I-65 carries a B on the BridgeSafety Condition Score with 74/100. 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 1968 and is now 58 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. I-65 carries an average daily traffic count of 124,369 vehicles, with 7 lane(s) crossing 21st Street. 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-65 is a 58-year-old bridge located 04.16 N I-70 in Marion County, Indiana. The bridge carries I-65 over 21st Street with 7 traffic lanes, handling approximately 124K vehicles per day. Built in 1968 and reconstructed in 2005, the structure spans 52.2 meters.
The bridge received a Condition Grade of B (74/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-65 has a Condition Score of 74/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-65 was built in 1968 and reconstructed in 2005, making it 58 years old. The average bridge age in the United States is 48 years.
I-65 carries approximately 124K vehicles per day (average daily traffic). The bridge has 7 traffic lanes. It is 52.2 meters long and located on I-65 in 04.16 N I-70, Marion County, Indiana.
No, I-65 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-65 is located 04.16 N I-70 in Marion County, Indiana. The bridge carries I-65 over 21st Street. Its coordinates are 39.794981, -86.164700. It is maintained by State Highway Agency.
I-65 carries I-65 over 21st Street. The bridge is 52.2 meters long and was built in 1968, with reconstruction in 2005.
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.