Heidi Whiteaker, Fort Scott, and Eric Duderstadt, Ottawa, have announced their engagement.She is the daughter of Doug and Denise Whiteaker, Fort Scott.He is the son of Wayne and Cathy Duderstadt, Ottawa.Her grandparents are Thad and Sue Whiteaker and Mayetta and Ruby Koehn, Galva.His grandparents are Wayne and Ruth Herrmann, Merriam, and Charles and Opal Duderstadt, Overland Park.His great-grandmother is Lenna Adams, Lenexa.She graduated from Ottawa University in 2007. She works at TFI Family Services and is attending Mid-America Nazarene College for a masterís degree.He graduated from Ottawa University in 2007. He works at Water Systems Engineering Corporation.The wedding is scheduled for Sept. 13, 2008, at Gunn Park, Fort Scott.