Thanks  to the efforts  of  one  the  Foundation’s past-presidents, Odis Lowe and  life-long resident Jerry Wimpee, one of the oldest windmills in Rockwall County, dating back to 1866, now stands proudly behind  the main museum. It was originally erected near the present-day corner of Hartman and Renfro streets by J. H. Hartman and provided water for his steam-powered cotton gin. It stands sixty-five feet tall with an eight-foot blade span.