Milwaukee River past Grafton to downtown Milwaukee, where it empties into Lake Michigan. Cedar Creek, the Menomonee River and the Kinnickinnic River are the three main tributaries. The Milwaukee River watershed drains in southeastern Wisconsin, including parts of Dodge, Fond du Lac, Milwaukee, Ozaukee, Sheboygan, Washington and Waukesha counties. The Milwaukee River watershed is part of the Lake Michigan subbasin; this subbasin is itself a part of the St. Lawrence River Watershed, which is fed by the Great Lakes. The Milwaukee River area was populated by Native Americans in the time before European settlement. Jacques Marquette and Louis Jolliet navigated from Lake
Lake, Milwaukee County, Wisconsin into two townships: the Town of Milwaukee, encompassing everything north of the present Greenfield Avenue, and the Town of Lake, encompassing everything South of the present Greenfield Avenue; "and the polls of election shall be opened at the house of Elisha Higgins, in said town." On March 8, 1839, a new Town of Kinnikennick was created, encompassing the western part of Lake (later the Towns of Greenfield and Franklin); and on August 13, 1840, the south portion of the Town of Lake was split off to form the town of Oak Creek. As of the 1840 census, the population of