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Telangana Approves Aerial Geophysical Surveys to Restart Srisailam Canal Tunnel

A ₹2.36 crore helicopter-borne VTEM survey by NGRI will precede an aerial LiDAR mapping to inform safe recommencement of the final 9 km of tunnel work.

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Overview

  • Irrigation Minister N. Uttam Kumar Reddy has ordered officials to treat completion of the remaining tunnel stretch as a very high state priority with expedited interdepartmental clearances
  • The government granted administrative approval for a Rs. 2.36 crore versatile time-domain electromagnetic survey to be carried out by the National Geophysical Research Institute
  • The VTEM operation will use helicopter-mounted sensors to map geological strata up to 1 km below the surface along roughly 9.5 km of the alignment to pinpoint fault lines and unstable shear zones
  • The Geological Survey of India is set to conduct an aerial LiDAR survey to produce high-resolution terrain and subsurface data for precise tunnel bypass planning
  • Finishing the last 9 km of the 44 km tunnel will restore gravity-fed irrigation for 400,000 acres and potable water to 516 villages while cutting about ₹750 crore in annual pumping costs