Dean Allan Denison

Dean Allan Denison was born January 7th, 1961, in St. Anthony’s Hospital, in Martin S.D. He was the oldest son and second child of Wallace and Sharon Denison. He was raised on a family farm between Martin, S.D. and what used to be Patricia S.D. He grew up in Bennett County, attending school at Martin grade School, and then Tuthill School after his family moved to the Tuthill Area. 

Dean participated In football and wrestling while at Bennett Co. High school, but his main interest was anything with wheels. He started with his tonka trucks, many his dad still has. His love of wheels then moved to his dirt bikes and working on his truck. After graduating in 1979, he worked for several of the neighbors, helping with their farming, but also working on equipment. After a couple of years he attended a technical school in Tulsa OK, and became certified welder. He was later talked into moving to Phoenix AZ by his buddy Paul Slattery. There they both went to work for different construction companies building all types of buildings, including the visitors center at Hoover Dam. Paul and his wife Linnae introduced Dean to his future wife, Connie Seguin and they were later married in February 1992. Connie brought her three children to the marriage and Dean gladly made them part of his family. He enjoyed taking the kids fishing, hunting and to Nascar races. He enjoyed spending time with all of the kids and grandkids. 

Dean died at his home in Gilbert Arizona on August 24,2022. He is preceded in death by his mother, Sharon Denison and both sets of grandparents. Left to grieve his loss are his wife Connie, his step children, Lisa Seguin, her children Christian and Lily. Robert and Azucena Sequin, and their children, Haley, Addison, Miguel, Leslie and Stephen, Brett Seguin and his fiancée Marianne and his sons Dayton and Dash. Dean also left behind his Dad, Wallace Denison, sister, Debra Spencer, brothers, Kenny and Frances Denison and Jim and Katie Denison. He also leaves behind nephews Joel and Joshua Spencer, niece Jessica Denison, and several aunts, uncles and cousins. 

A Celebration of Life is being planned for October 15, in Mesa Arizona, and another memorial dinner is being planned at a later date in the Martin Area. 

502 Second Avenue, Martin, SD 57551 • 605-685-6866 •