In January 2015, Government of India approved the establishment of a Neutrino Observatory at:

In January 2015, the Government of India, chaired by the Prime Minister, approved the establishment of the India-based Neutrino Observatory (INO) [1]. The project, with an estimated cost of Rs. 1583.05 crore, received financial sanction on January 6, 2015 [1]. The observatory is designed to be a world-class underground laboratory aimed at studying the properties of neutrinos, specifically the neutrino mass hierarchy [4]. The approved site is located at Pottipuram in the Bodi West Hills (BWH) of the Theni district in Tamil Nadu [2]. This location was chosen as an alternative after a previous site in Singara was denied environmental clearance due to its proximity to elephant habitats [4]. The facility will feature a 51,000-ton Iron Calorimeter (ICAL) detector housed under a rock cover of approximately 1200 meters [3].

Sources

1. [1] https://www.pib.gov.in/newsite/PrintRelease.aspx?relid=116886
2. [2] https://pib.gov.in/PressReleaseIframePage.aspx?PRID=1541068
3. [4] https://www.science.org/content/article/india-neutrino-lab-dealt-serious-blow
4. [3] https://www.indiascienceandtechnology.gov.in/megascienceprojects/india-based-neutrino-observatory-ino