Interesting note though, the Horseshoe falls did run dry naturally during the winter of 1848 [1]. High winds on Lake Erie pushed ice into the mouth of the Niaga

Interesting note though, the Horseshoe falls did run dry naturally during the winter of 1848 [1]. High winds on Lake Erie pushed ice into the mouth of the Niagara River, eventually resulting in an ice jam that blocked the flow of water into the river and stopped both falls. [1] http://www.niagarafrontier.com/fallsstopped.html http://www.niagarafrontier.com/fallsstopped.html