Kolkata Metro: Rs 500 crore sanctioned for Tollygunge and Dum Dum tunnel overhaul
Kolkata Metro Rail Corporation Ltd (KMRCL) is set for a major overhaul of its 40-year-old North?South (Blue Line) tunnel between Tollygunge and Dum Dum. The project is estimated to cost Rs 500 crore.
This overhaul project comes after the detection of subsidence and water seepage in parts of the old underground stretch. The period of completion of the work is 3 to 4 years.
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