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Mumbai to face 20% water cut for 10 days as BMC commissions water tunnel

The new water tunnel will boost supply pressue by accumulating all the water in one place.

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The Brihanmumbai Municipal Corporation (BMC) is all set to commission a massive tunnel that will bring all the water below the ground in one place and boost supply pressure. This will help in providing uninterrupted water flow to the city as well as stop the transition loss due to leakages and tampering.

The BMC is planning the commissioning of underground tunnel between Gundavali and Kapurbawadi. Following the work, 20% water cut will be implemented in entire Mumbai on August 22, 23, 26, 27, 28, 30 and 31 and September 1. Moreover, the areas situated at the fag end of the distribution zone, elevated areas and residents on upper floors having direct supply in city area will be more affected due to low pressure.

The Rs2000 crore project is in two parts — from Gundavali (near Bhiwandi) to Kapurbawdi (Thane) and from Kapurbawdi to Bhandup Complex. Though the distance between Gundavali and Bhandup Complex is more than 100km, the aerial distance is close to 15km. The tunnel, having a capacity of 4,000 MLD also passes under Thane Creek, which runs up to a kilometre before proceeding to Bhandup Complex.

All citizens in Mumbai have been told to store sufficient water a day before; their cooperation is crucial to the success of this project, said civic officials.

These tunnels are earthquake-resistant structures and have a life of 100 years, leading to minimum operation and maintenance cost. Tunnels that begin 60-100-metre deep underground help in curbing losses due to thefts and leakages, thus playing a major role in reducing the percentage of non-revenue water and contamination, as well as not require expenses on account of land acquisition and rehabilitation. Also, the tunnels operate on gravitational flow and don't require additional cost for pumping.

Mumbai being densely populated and having heavy road traffic also has a large network of underground utilities which makes it extremely difficult to lay new water main pipelines of large diameters by open trench method. Hence, construction of tunnels for water supply was the best available option to avoid inconvenience to the public and commuters.

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