
The unincorporated community of Duncan sits at the heart of this Hancock County landscape, defined by the headwaters of the Iowa River. The terrain is a clear illustration of agricultural water management in the Midwest, where the natural winding course of the W Br Iowa River and the East Branch Iowa River are supplemented by the engineered precision of Drainage Ditch Number 6. This network of waterways drains the low-lying areas surrounding Eagle Lake to support the surrounding farmland.
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