READ RESIGNATION LETTER MATHES, WHO REVITALIZED IDA, LEAVING 3rd Resignation Creates Crisis For Otsego Now By JIM KEVLIN • Special to www.allotsego.com ONEONTA – The coup is complete. Sandy Mathes, who revolutionized economic development in Otsego County in the past three years, has given the 90-day notice required by his contract, and will be departing as CEO of the Otsego Now organization he created by summer’s end. As if to punctuate the end of an era, Bob Hanft of Pierstown, who chaired what was then the county IDA when Mathes was brought aboard in January 2014, and veteran board member…