When the Boundary Waters Treaty governing waters straddling the U.S.-Canada border was drawn up more than a century ago, concerns such as climate change and replacing the infrastructure were totally unknown. Now, a Schulich School of Engineering professor and researcher is heading up an independent cross-border study into updating the oldest piece of legislation governing the use of water that runs between the two countries. Dr. Alain Pietroniro, PhD, is an internationally respected expert in hydrology and sustainable water systems, having spent more than three decades studying water resources engineering. Through his involvement with the International Joint Commission, Pietroniro is co-chairing a study of the treaty, to examine the options of improving access to study the shared waters of the St. Mary and Milk Rivers, which cross the Alberta-Montana border.