Minnesota Public Radio slideshow:
Drainage ditches cause pollution; oversight is spotty
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The confluence of the Minnesota and Mississippi Rivers. This photo illustrates the pollution and sediment that is contained in the Minnesota, and dumped here into the Mississippi. The Minnesota has been called the state's dirtiest river. (Photo courtesy of the MPCA)

The confluence of the Minnesota and Mississippi Rivers. This photo illustrates the pollution and sediment that is contained in the Minnesota, and dumped here into the Mississippi. The Minnesota has been called the state's dirtiest river.

(Photo courtesy of the MPCA)
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