All I could find in the books was this line from the Rifts Main Books:
...two dozen ley lines slice through the ruins and a ley line nexus sits in what was once the downtown metropolis, a few miles from the shores of Lake Michigan.
Moderators: Immortals, Supreme Beings, Old Ones
...two dozen ley lines slice through the ruins and a ley line nexus sits in what was once the downtown metropolis, a few miles from the shores of Lake Michigan.