Bill, age 90, passed away peacefully on April 13, 2021. Beloved husband of Mary Sue Coates for 66 years, loving father of Catherine (Henry) Terwedow, Gordon (Philippa) Coates and Susan (Joseph) Plomin, grandfather of Rose and J. D. Plomin, Willy and Nikita Terwedow, Ian and Dora Coates and brother of Robert S. Coates of Port Angeles, WA.
Bill graduated from New Trier High School and received his degree in Actuarial Science from the University of Michigan. After working many years in corporate insurance, he started his own company, Daniels-Head Insurance.
Bill and Mary Sue lived in Elgin prior to moving to Hinsdale, where they lived for 44 years. He served 11 years as a volunteer firefighter for the Hinsdale Fire Department, and spent his free time creating beautiful gardens, complete with a pond, waterfall and prairie before moving to LaGrange Park.
He was a 65-year member of the Chicago Mountaineering Club. His love of the mountains took him all over the world, including to Denali, where he was one of the first 100 climbers to summit. His group tested the freeze-dried food used by NASA on their first moon shot.
Bill was an avid lover of nature, particularly enjoying camping and bicycling. He visited over 130 countries, and also volunteered as a docent for Brookfield Zoo (18 years) and in the Plant Clinic at the Morton Arboretum (12 years).
He is greatly missed by all who knew him.
Published by Chicago Tribune on Apr. 18, 2021.