VIROQUA, Wis. – The Vernon County Board approved a federal plan to tear out grass-covered dams in danger of collapse in southwest Wisconsin. The U.S. Natural Resources Conservation Service says a total of 23 dams, built in the 1950s and 1960s, are at of risk of failing because water has cracked through the sandstone. The federal agency also is seeking similar approval from LaCrosse County and Monroe County. Massive storms in August of 2018caused five of the grass-covered dams to break. Catastrophic damage resulted.