New GM Rosenthal On Helm At Otesaga By JIM KEVLIN • Special to www. AllOTSEGO.com COOPERSTOWN – In September 2013, The Otesaga’s new general manager, Marty Rosenthal, had just completed his first year as GM of a major hotel, the 269-room Millenium Harvest in Boulder, Colo. If he thought he could relax, he had to quickly think again. On Sept. 11, the worst floods in its history struck Colorado, and Boulder was hit hardest, with rains peaking at 17 inches…