Patkar said the state government has asked the affected families in the submergence area of the dam, close to Narmada river in MP to vacate their dwellings by July 31.
"I am going to start my indefinite fast along with oustees, activists and others at Barwani tomorrow," Patkar told PTI over phone today.
"More than 40,000 families in MP's Barwani, Alirajpur, Dhar and Khargone districts had been displaced due to the closure of the gates of Sardar Sarovar Dam in Gujarat built on Narmada river, last month," she added.
The state government was flouting the Supreme Court's orders of 2005 and 2017 regarding rehabilitation of oustees, she claimed.
"I want that the gates of Sardar Sarovar Dam should be opened and the oustees rehabilitated first. The reservoirs in Gujarat were full with water due to recent rains and there was no urgency to store the water in Sardar Sarovar Dam," she argued.