The panelists talked about Supreme Court cases involving the Clean Water Act, beginning with the Rapanos and Carabell cases having to do with wetlands. The discussants were involved in arguing the cases. Later, some of the participants described arguing the S.D. Warren case which specifically dealt with Section 401 of the Clean Water Act. It was noted that there are a growing number of cases challenging the framework of federal environmental laws on constitutional grounds. After their presentations the panelists answered audience members' questions. Mr. Echeverria served as moderator.