
The St Clair River defines the eastern edge of this Michigan landscape, serving as an international boundary between United States Canada and marking the industrial and recreational corridor of St. Clair County. The city of Marine City stands as a focal point, showing a developed riverfront with U S Customs, City Hall, and the Port Huron and Detroit railroad line. To the south, the extensive marshes and wetlands around Bouvier Bay and Pearl Beach contrast with the inland agricultural grid, where roads like Plank Road and Marine City Highway connect small settlements like Starville and Beaverdam.
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