Ajit Borthakur, J.

1. By preferring the above two writ petitions under Article 226 of the Constitution of India, the petitioners have challenged the legality and validity of acquisition of 12.62 hectares of their land for construction of 2000 MW, Upper Subansiri Hydro-Electric Project at Menga, Upper Subansiri District, Arunachal Pradesh, without adhering to the provisions of law governing acquisition of land. The petitioners' case, in a nutshell, is that the National Hydro Power Corporation Ltd. (for short 'NHPC Ltd.') initiated a Hydro-Electric Project, known as Upper Subansiri Basin Project in the Upper Subansiri District of Arunachal Pradesh for generating 2000 MW electricity power. With the said object, the respondent No. 10, the Senior Manager (Civil), NHPC Ltd., Daporijo, Upper Subansiri District, Arunachal Pradesh, by a letter, dated 12.07.2000, requested the respondent No. 6/Deputy Commissioner, Upper Subansiri District, to allot about 50 (fifty) hectares of land for construction of temporary residential and non-residential buildings near Daporijo/Sippi or Menga. Accordingly, the respondent No. 6/Deputy Commissioner, Upper Subansiri District, issued Circular No. L