Hyderabad, Feb. 3 -- The National Geophysical Research Institute's (NGRI) Versatile Time-Domain Electromagnetic (VTEM) survey in Telangana's Nallamalla forest range, where the Srisailam Left Bank Canal (SLBC) tunnel is under construction, has yielded vital information on the geographical fault lines in the area, people aware of the matter said on Monday.

Scientists with NGRI on Sunday presented the survey reports to state irrigation minister, N Uttam Kumar Reddy, at a high-level review meeting held to discuss resumption of construction work on the tunnel, which was abandoned after it collapsed on February 22, 2025, killing eight people, including two project engineers.

"The results are encouraging, providing valuable geological data abo...