In an important development, the Mumbai Metro Rail Corporation (MMRC) on Wednesday completed a 1.5-km long tunnel beneath the Mithi River. Terratec-made Tunnel Boring Machine (TBM) Godavari-4 completed the upline stretch of 1.5-km from BKC to Dharavi.

Godavari-4 was commissioned on August 21, 2019, from BKC launching shaft and shaped the tunnel with 1,043 RCC rings up to Dharavi. This is the 29th breakthrough on the Colaba-Bandra-SEEPZ Metro-3 corridor.