West River Dairy, one of several dairy farms managed by Riverview LLP, houses 6,400 cows in the countryside near the rural community of Morris in western Minnesota. Built in 2004, West River originally relied on a “naturally vented” barn system, in which curtains along the walls could be rolled up to let air through the barn. With fan technology becoming more common in agricultural settings, however, Riverview recently installed a cross-ventilation fan system at its West River facility to pull air through the barns and milking parlor as needed.