Back in the late 60's Ohio also had plans of a 70,000 seat stadium with the idea of replacing Northwestern in the B1G. It never happened as was probably a good thing as it would have been way too big.

Not looking at the drawings of the past but talking today.......Ohio fans are regularly discussing expansion from anywhere between 35,000 and 50,000 seats. Most think Ohio can eventually get attendance up into the mid 30k range with an expanded facility.