Tata Power has forwarded a proposal to set up a high voltage 400 kV line corridor for Mumbai, to the state government and the state regulatory authority.

The new transmission corridor of 400 kV will help meet the city’s growing electricity demand and enhance distribution capacity of up to 15,000 MW in the future.

Once approved, this project is estimated to be completed in four to five years at a cost of around Rs 1,000 crore. The transmission line will have a ring formation, involving two hemispheres of 30 km each, wherein if one hemisphere fails, the other will act as a backup.

Currently, Mumbai's demand of around 3,500 MW is met by 110 kV and 220 kV lines.

The integrated power company maintains 1400 MW through its power purchase agreements (PPA), and plans to invest another Rs 700 crore over the next financial year to improve transmission.