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Lake Chicago was a prehistoric proglacial lake that is the ancestor of what is now known as Lake Michigan, one of North America's five Great Lakes. Formed about 13,000 years ago and fed by retreating glaciers, it drained southwest through the Chicago Outlet River.
The Chicago Portage National Historic Site is outlined in red and the map shows the entrance to Mud Lake and the West End Landing. Chicago Portage From Knight and Zeuch Study. Further proof that the original course of the Des Plaines River is as shown comes from the third map, one of many from the Knight and Zeuch study of the Chicago Portage.
Lake Calumet is the largest body of water within the city of Chicago. Formerly a shallow, postglacial lake draining into Lake Michigan, it was transformed into an industrial harbor during the 20th century. [1] Parts of the lake have been dredged, and other parts reshaped by landfill.
The Chicago Lake Tunnel was the first of several tunnels built from the city of Chicago's shore on Lake Michigan two miles out into the lake to access unpolluted fresh water far from the city's sewage.
The Chicago Lakefront Trail (LFT [1]) is a 18.5-mile-long (29.8 km) [2] partial shared-use path for walking, jogging, skateboarding, and cycling, located along the western shore of Lake Michigan in Chicago, Illinois. The trail passes through and connects Chicago's four major lakefront parks along with various beaches and recreational amenities.
Chicago's earliest sand beaches resulted naturally from capturing sand moved by the current south along the shoreline toward the Indiana Dunes, but these beaches were dynamic, shifted and eroded. When Chicago began building piers and other structures into the lake, large sandy beaches formed generally to the north of a pier due to sand capture. [5]
Glacial Lake Chicago at the Glenwood Shoreline. The Glenwood Shoreline is an ancient shoreline of the precursor to Lake Michigan, Lake Chicago. It is named after the town of Glenwood, Illinois. The shoreline was formed when the lake was higher during the last ice age, while ice blocked the Straits of Mackinac. After the straits were freed, the ...
The Chicago Harbor Lock, also known as the Chicago River & Harbor Controlling Works, is a stop lock and dam located within the Chicago Harbor in Chicago, Illinois at the mouth of the Chicago River. It is a component of the Chicago Area Waterway System , and is used to control water diversion from Lake Michigan into the river and for navigation.