National Geographic : 1937 Jun
o Photograph from Memphis Engineer District HEAVY STONES HELP TO KEEP OLD MAN RIVER FROM GNAWING AWAYHIS BANKS Men and machines along the Mississippi grade the levee banks and lay riprap paving to protect them from waves and currents. Inearlier days protective mats were often made of woven willows or other small trees. Now concrete or asphalt mats are more general (page 788). This stone riprapping isbeing used intheGayoso Bend revetment, 25 miles south of New Madrid, Missouri. ^.