Metro project is in full swing and almost every where in Mumbai we can see the work of Metro going on. Line 3 of the Mumbai Metro, also referred to as the Colaba–Bandra-SEEPZ line, is a part of the metro system for the city of Mumbai. When completed, the 33.5-km long line will be the first underground metro line in Mumbai. The metro line will connect Cuffe Parade business district in the extreme south of the city to SEEPZ in the north-central with 26 underground and one at-grade station. The track width is standard gauge. The cost of this corridor is estimated at 23,136 crore (US$3.6 billion). Line 3 is expected to reduce road congestion, besides reducing the load on the Western Line between Bandra and Churchgate.
So the latest buzz is that TBM (Tunnel boring machine) is coming in Mumbai just for this underground project from Germany.Tunnel boring machines are used as an alternative to drilling and blasting (D&B) methods in rock and conventional hand mining in soil. TBMs have the advantages of limiting the disturbance to the surrounding ground and producing a smooth tunnel wall. Executive director (planning) at MMRC R Ramana said to Indian Express the Line 3 will need 17 tunnel boring machines (TBMs) which will arrive by end-August and the tunnelling will start from October from the proposed Naya Nagar station in the Dharavi slum area in central Mumbai.
The project is being implemented by the Mumbai Metro Rail Corporation Limited (MMRCL). The line starts at Cuffe Parade, will run through Nariman Point, Churchgate, CST, Girgam, Worli, Mahim, Kalina University, Dadar, Bandra, Bandra-Kurla Complex, Santacruz East and past the domestic and international terminals of Mumbai Airport, through Andheri MIDC and terminates at SEEPZ.