Tirupati: The Poola Subbaiah Veligonda irrigation project crossed a significant milestone on Tuesday. The tunnel excavation works for the mega irrigation project started 15 years ago. The state water resources department took up the excavation of two tunnels from Kothur near Dornala in Prakasam district to Kollam Vagu in the upper reaches of the Srisailam project in the Nallamala forest …
