Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Black River is a river in the U.S. state of Michigan, flowing into the St. Clair River at 42°58 19 N 82°25 06 W in the city of Port Huron. The Black River Canal in northern Port Huron extends east into Lake Huron near Krafft Road. The river rises in northern Sanilac County, near the boundary with Huron County, at 43°41 00 N 82°48 55 W and its drainage basin covers most of the central and southern portions of Sanilac County, most of northern St. Clair County, and portions of east central Lapeer County. Large sections of the upper portion of the river and much of its drainage basin are heavily channelized for agricultural irrigation.