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These are concentrations generally caused by water that flowed in an ancient river or stream . The whole Union is deeply interested in the safe and easy navigation of the great rivers and lakes within the limits of the United States , and bordering on two or more states . Prior to its discovery , the new species of photosynthetic algae was combined with another group of diatoms found in cold , pristine rivers and streams around the world . Combined with snowmelt , as temperatures rise into the 40s in the headwaters , the rainfall could cause small rivers and streams to go over their banks Saturday afternoon and Saturday night . Dramatic limestone formations , scenic vistas , pristine rivers and wildlife values that are truly unique paint the picture that is the spectacular Rocky Mountain Front , the area that lies just to the south of Badger-Two Medicine .