Posted 12/18/2016 19:51 (#5707905 - in reply to #5706867) Subject: RE: Where is the midwest? Thought Iowa was there.
SE MN Still in Pothole Country
The Nortwest Ordinance in late 1700's provided for surveying land in mile square sections. Starts in Ohio IIRC. I would say everything north of Ohio River west to the Rockies if it is laid out in mile grids.