EPA uses rare veto to prevent giant flood control pump The U.S. Environmental Protection Agency (EPA) has this week exercised a rare veto under the Clean Water Act of 1972 in order to kill off the introduction of a giant flood control pump proposed for the Mississippi Delta. The EPA ruled that the $220 million U.S. Army Corps of Engineers flood-control project would destroy thousands of acres of wetlands, putting at risk the habitats of hundreds of endangered species as well as reducing water quality in the region. The controversial pump, which is supported by farmers, city and local-elected officials, would shift six million gallons of water per minute from 67,000 acres of wetlands along the Yazoo River, mostly for the benefit of flood-prone farmers, reports the Associated Press....