Leaving On His Own Schedule, Korthauer Makes History Here Oneonta’s 3rd City Manager Retires By JIM KEVLIN • Special to www.AllOTSEGO.com ONEONTA – George Korthauer has made history: He is the first Oneonta city manager to largely serve out his contract and depart on his own terms. After announcing his retirement Monday, Jan. 13, he’s leaving office on Feb. 7, a few months before the August expiration of his three-year contract, but before the iciest and snowiest month of February…