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
Milwaukee "inner-ring" suburbs. In the 1920s Chicago gangster activity came north to Milwaukee during the Prohibition era. Al Capone, noted Chicago mobster, owned a home in the Milwaukee suburb Brookfield, where moonshine was made. The house still stands on a street named after Capone. By 1960, Milwaukee had grown to become one of the largest cities in the United States. Its population peaked at 741,324. In 1960, the Census Bureau reported city's population as 91.1% white and 8.4% black. By the late 1960s, Milwaukee's population had started to decline as people moved to suburbs, aided by federal subsidies of highways. They