A mining company that operates a sand and gravel mine on Lower Grey Cloud Island in Cottage Grove, Minn., wants to expand and shift operations into the Mississippi River – and mine the actual riverbed. Holcim MWR Inc., formerly Aggregate Industries, is proposing to move its mining area to mine additional aggregate reserves on about 400 acres of privately owned land that it leases adjacent to the existing facility in the backwaters area of the Mississippi River on Lower Grey Cloud Island.
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