rime Minister Narendra Modi inaugurated India’s first under-river metro tunnel in Kolkata on March 6, marking a big stride within the metropolis’s city transportation. The Kolkata Metro extension, particularly the Howrah Maidan-Esplanade Metro part, options the nation’s first tunnel underneath a serious river, whereas the Howrah Metro Station is the deepest (33 meters beneath the floor), one in all its variety within the nation.
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