Interview with Ramaswamy R. Iyer, former Secretary, Union Ministry of Water Resources. THE controversy over the Mullaperiyar dam has acquired emotional overtones, with both Kerala and Tamil Nadu adopting intractable positions on the future of the dam. Is there a middle ground? In this interview, Ramaswamy R. Iyer, a well-known expert on inter-State water disputes, offers a sensible way out of the imbroglio.