Henrietta Vande Waerdt Feb 1, 2017 | Obituaries Vande Waerdt Vande Waerdt 88 Rock Valley, Iowa January 23, 2017 Henrietta Vande Waerdt, 88, of Rock Valley, Iowa, died Monday, Jan. This content is for Sioux County Index Online Subscription and Back to School Special members only.Register Already a member? Log in here