Hyderabad, April 15 -- The National Green Tribunal (NGT) in Chennai has directed the Telangana government to file pre-1950 original maps, along with the latest maps, of Osman Sagar and Himayat Sagar reservoirs.

The NGT was hearing the case filed by activist Dr Lubna Sarwath pertaining to the Osman Sagar and Himayath Sagar, where she alleged the tampering of Full-Tank Level (FTL) maps and hundreds of officially notified encroachments inside the reservoirs.

The petitioner drew the attention of the NGT bench that Hyderabad Metropolitan Water Supply and Sewerage Board (HMWSSB) gave an FTL map in its reply to a request made under the Right to Information (RTI) Act, mentioning the total area of Osman Sagar reservoir as 6,335 acre. She po...