Measuring Water Quality–Upper Mississippi River, East Channel, Prairie du Chein, Wisconsin

East Channel: Prairie du Chien
Crawford County, Wisconsin

 
 
 
 
“In the Upper Mississippi, half-buried in silt and sand, are scattered congregations of naiad mussels. They are simple creatures, little more than two strong shells or ‘valves’ enclosing a soft, formless body. Blind and virtually brainless, they lie on the river bottom with shells agape, laved in the [...]