Cincinnati Street Railway power substation on Colerain Avenue at Arlington Street in Camp Washington, looking northeast from Arlington Street in Camp Washington. I-75 is just behind this building, and Colerain Avenue now ends a short distance to the left of this photograph. This substation, built in 1925, was listed on the National Register of Historic Places to protect it from expansion of I-75. The metal doors shown here have since been replaced with a roll-up overhead door.