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2019 Map of Saint Clair Flats

Name: 2019 Topographic Map of Saint Clair Flats
Creator: U.S. Geological Survey
Published: 2019
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2019

About this map

The intricate delta environment of the Saint Clair Flats is revealed in this 2019 survey, illustrating the complex intersection of land and water where the Saint Clair River meets Lake Saint Clair. This unique freshwater archipelago is defined by its extensive marshlands and narrow distributary channels, including the South Channel and Middle Channel. Small settlements like Miller and Riverside sit along the southeastern shores of Harsens Island, connected by a network of uniquely named thoroughfares such as Maybury Highway and Peninsular Highway.

Further west across the open waters of Big Muscamoot Bay, the map charts a series of smaller landmasses like Bruckner Island and Green Island, often accessible only by water via passages such as Broad Cut. The international boundary between the United States and Canada runs through the main river channel, marking the edge of this maritime landscape. The density of named cuts and highways, such as Johnnies Highway and Mudhen Highway, reflects a long-standing local culture of water-based navigation and seasonal island life.