India's first underwater metro train project likely to be completed by March 2022

India's first underwater metro project is nearing its completion but the cost of its construction has almost doubled after years of delay in completing the project, according to Bloomberg. The first underwater metro project is being constructed in Kolkata, a part of which will pass under the iconic Hoogly river on which the famous Howrah bridge is constructed. It is expected to be completed in 2022.

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