Jones Island, Milwaukee contains a couple of mature trees. Jones Island, Milwaukee Jones Island is an industrialized peninsula in Milwaukee, Wisconsin. It began as a marsh island between the Milwaukee and Kinnickinnic rivers, and now forms the city's inner harbor design. Extensive filling and channelization of the area began in the mid-19th century when city co-founder Byron Kilbourn advocated a "straight cut" from the Milwaukee River near the Menomonee River confluence out to Lake Michigan. This channel was made in 1857 and is still in use today. Prior to that, the natural outlet for all three rivers was at the southern end of
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