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Sag Bridge, Chicago Outlet River, Illinois River, Rte. 83 #146056961
Description
Sag Bridge exists at a significant geophysical point, at the confluence of the Sag Outlet and DesPlaines Outlet from historic Lake Chicago, which joined at this point to form the Chicago Outlet River and eventually flow into the Illinois River and the Mississippi River. Those two outlets isolated a portion of the Valparaiso Moraine called Mount Forest Island, much of which has been preserved in its natural state as the Palos Division[2] of the Forest Preserve District of Cook County.
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