DUNNVILLE—Around 15 years ago, Herman ‘Herm’ DeRuiter started building a windmill. There had been a man in Wellandport who had made a number of windmills, and Herman had gone out to talk to him. DUNNVILLE—Ed and Marjorie Hoekstra knew Brenda DeRuiter and her late husband, Herman. When Herman passed almost five years ago, he left a windmill he’d been building…