2018 DNR sale set for April 14 3/27/2018 11:53:00 AM View Count 18468 DES MOINES – The Iowa Department of Natural Resources will hold the 2018 spring auction on April 14, at Pioneer Livestock Pavilion on the Iowa State Fairgrounds, in Des Moines. Doors will open at 7 a.m., and the auction will begin at 8:30 a.m.