“The tunnelling works below the Mutha river had been completed. The tunnels are 13 meters below the riverbed. It is the lowest point of the underground metro. Now within a week, the TBM would reach at Kasba peth underground station,”

https://www.hindustantimes.com/cities/pune-news/after-crossing-mutha-riverbed-metro-tbms-reach-kasba-peth-station-101623426326247.html