For years bison have been crossbred with cattle, but the ones coming to Midewin will be genetically pure with a good mix of males and females. they will be lured to the corral area for yearly checkups by a 1,500 gallon watering system, part of a 3,000-gallon system that resembles a scaled-down version of the ammunition bunkers elsewhere on Midewin which used to be part of the huge Army Joliet Arsenal.
Midewin engineer Bob Hommes, who oversaw construction of the infrastructure has ties to Midewin. His mother worked at the Joliet Arsenal during World War II and the Korean War. her friends at work introduced her to his father.