New York Times: Aboard the Dorothy Ann, in Lake Erie near Fairport Harbor, Ohio As Capt. Jeremy R. Mock steered this 711-foot combination of tug and barge toward a harbor berth, a screen of red numbers indicated the decreasing depth of water under the vessel: 6 feet, 3.6 feet, 2 feet. Suddenly the numbers gave way to a line of red dashes: . It was a signal that there was not enough water to measure. Drought and other factors have created historically low water marks for the Great Lakes, putting the...