The Supreme Court Tuesday said the litigation pertaining to 126-year-old Mullaperiyar dam is not “adversarial” as this is a PIL in the sense that safety, security and health issues of the people staying around the dam are involved in the matter. Mullaperiyar dam was built in 1895 on the Periyar river in Idukki district of Kerala. A bench headed by Justice A M Khanwilkar told the advocates appearing for the respective parties in the matter that they should assist it in identifying the “core issues” which needs to be addressed by the court.