An open house will be held this weekend for a major expansion at Waupun Memorial Hospital. Hospital chief operating officer DeAnn Thurmer says the $23 million addition will open on September 26. Thurmer says the two story, nearly 53,000 square foot addition will house medical-surgical patient rooms, intensive care, labor-delivery and postpartum rooms. Thurmer says the new rooms are larger. The public is invited to an open house from 11am to 2pm on Sunday September 24.