
The Mississippi River creates a complex network of islands and sloughs along the border of Iowa and Illinois, anchored by the riverfront settlement of New Boston. This 1940s landscape is defined by the managed flow of the river, featuring Lock and Dam No 17 and a series of large islands including Otter Island, Keg Island, and Jonas Johnson Island. The convergence of the Iowa River and Edwards River with the Mississippi reveals a highly articulated riparian environment where drainage and navigation were primary concerns, evidenced by the Pumping Station and several levees.
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