 Water diversion is regulated by the 1950 Niagara Treaty and is administered by the International Niagara Board of Control (IJC).The verdant green color of the water flowing over the Niagara Falls is a byproduct of the estimated 60 tonnes/minute of dissolved salts and "rock flour" (very finely ground rock) generated by the erosive force of the Niagara River itself.The features that became Niagara Falls were created by the Wisconsin glaciation about 10,000 years ago.