64 per cent tunnel construction work completed under Mithi River Rejuvenation Project February 16, 2024 | Key Segments, Municipal Wastewater, Ongoing, Project Updates, Wastewater About 64 per cent of construction work on Bapat Nalla to Dharavi wastewater treatment plant (WWTP) tunnel under the Mithi River Rejuvenation Project has been completed. This content is restricted.