Click here for an up-to-date listing of current St. Marys River flow as determined by its monthly regulation plan and current St. Lawrence River flow as determined by its weekly regulation plan.
Click here for historical hydraulic discharge measurement methodology and data on the St. Marys, St. Clair, Detroit, Niagara and St. Lawrence Rivers. These measurements have been made routinely by the United States and Canada since the late 1800s.
Click here for the 2007-2012 St. Clair River Analysis. Click here for the 2006 St. Clair River Analysis.
Click here for the 2007-2012 St. Clair River Analysis.
Click here for the 2006 St. Clair River Analysis.