Cohocksink Creek, Tributary in Northern Liberties and Kensington, Philadelphia, Pennsylvania.
Cohocksink Creek is an underground waterway that extends from Sixth and Thompson Streets to the Delaware River. It flows beneath the neighborhoods of Northern Liberties and Kensington in Philadelphia under the city's modern streets.
The waterway was modified in the late 1700s through damming to create a defensive barrier during the American Revolution. This change shaped its role in the city's defense strategy.
The name Cohocksink comes from the Lenape people who lived here long before European settlement. The waterway served as an important reference point and resource in their daily life and landscape.
The waterway is now part of Philadelphia's sewer system and lies completely below the surface. Since it is invisible, there are no direct locations to visit, but you can learn about its significance through the city's history.
William Penn took early steps to establish mill works along this waterway during the city's founding period. This early industrial use contributed significantly to the economic development of the young city.
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