The Great Mississippi River Greenway & Wildlife Corridor

I might be coining a term here: The Great Mississippi River Greenway and Wildlife Corridor

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There are municipal greenways on the Mississippi, research shows a few, around St. Louis, Minneapolis, and even Memphis, good natured nature projects by civic groups and governments that try to make the riverfront a common area for recreation, tourism, and nature,
http://www.planningdesignstudio.com/portfolio/greenways-trails/mississippi-river-greenway
http://www.stltoday.com/lifestyles/health-med-fit/fitness/trail-of-the-week-new-segment-of-mississippi-river-greenway/article_1c402714-4d12-5709-8b3e-c334621133c7.html
and there is even a National Trail of sorts:
http://www.mississippirivertrail.org/map.html

but its a driving route that links all the good spots.
I am unable to find any evidence that anyone has thought of the whole river, 'The Land Between the Levies', as what it has very well become, which is a sort of massive greenway and wildlife and nature corridor through the heart of the United States, accidental at that.