IR 75
IR 75 in .7 MI S Of SR 561, Hamilton County, Ohio received a condition grade of C (58/100). Built in 1958, the bridge carries 147K vehicles daily on IR 75 over Towne Avenue.
IR 75 carries a C on the BridgeSafety Condition Score with 58/100. Component ratings sit in the middle of the FHWA NBI distribution; rehabilitation programming is likely on the owning agency’s medium-term horizon.
The bridge was built in 1958 and is now 68 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 146,755 vehicles, with 6 lane(s) crossing Towne Avenue. 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 68-year-old bridge located .7 MI S Of SR 561 in Hamilton County, Ohio. The bridge carries IR 75 over Towne Avenue with 6 traffic lanes, handling approximately 147K vehicles per day. Built in 1958, the structure spans 50.6 meters.
The bridge received a Condition Grade of C (58/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 7/9 (good), and substructure 5/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
IR 75 has a Condition Score of 58/100 (Grade C). Its deck is rated 6/9, superstructure 7/9, and substructure 5/9 on the NBI scale. The bridge is not classified as structurally deficient.
IR 75 was built in 1958, making it 68 years old. The average bridge age in the United States is 48 years.
IR 75 carries approximately 147K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 50.6 meters long and located on IR 75 in .7 MI S Of SR 561, Hamilton 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 .7 MI S Of SR 561 in Hamilton County, Ohio. The bridge carries IR 75 over Towne Avenue. Its coordinates are 39.183519, -84.483919. It is maintained by State Highway Agency.
IR 75 carries IR 75 over Towne Avenue. The bridge is 50.6 meters long and was built in 1958.
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.