IR-75
IR-75 in 1.33mi.S. Of JCT. Usr-35, Montgomery County, Ohio received a condition grade of A (80/100). Built in 1965, the bridge carries 129K vehicles daily on IR-75 over Carillon BLVD Gt Miami R.
IR-75 carries an A on the BridgeSafety Condition Score with 80/100. 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 1965 and is now 61 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. IR-75 carries an average daily traffic count of 128,842 vehicles, with 6 lane(s) crossing Carillon BLVD Gt Miami R. 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
IR-75 is a 61-year-old bridge located 1.33mi.S. Of JCT. Usr-35 in Montgomery County, Ohio. The bridge carries IR-75 over Carillon BLVD Gt Miami R with 6 traffic lanes, handling approximately 129K vehicles per day. Built in 1965, the structure spans 285 meters.
The bridge received a Condition Grade of A (80/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 8/9 (good), and substructure 8/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
IR-75 has a Condition Score of 80/100 (Grade A). Its deck is rated 7/9, superstructure 8/9, and substructure 8/9 on the NBI scale. The bridge is not classified as structurally deficient.
IR-75 was built in 1965, making it 61 years old. The average bridge age in the United States is 48 years.
IR-75 carries approximately 129K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 285 meters long and located on IR-75 in 1.33mi.S. Of JCT. Usr-35, Montgomery County, Ohio.
No, IR-75 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
IR-75 is located 1.33mi.S. Of JCT. Usr-35 in Montgomery County, Ohio. The bridge carries IR-75 over Carillon BLVD Gt Miami R. Its coordinates are 39.728939, -84.207281. It is maintained by State Highway Agency.
IR-75 carries IR-75 over Carillon BLVD Gt Miami R. The bridge is 285 meters long and was built in 1965.
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.