Also in the south, the 400MW Kadamparai pumped storage plant came up in Tamilnadu state during the years 1987-89. It is located on a river of the same name and utilises the base created for the earlier 60MW Aliyar project. An upper reservoir had to be created by construction of a masonry-earthen dam. Its underground power house has four vertical Francis reversible units rated at 102MW, with generators of 100MW. The first unit was supplied by Boving and GE of the UK, while the latter collaborated with India's BHEL to supply the other three units, all of mixed type.
The Kadamparai Pumped Storage Hydro Electric station (4 x100 MW) in Coimbatore District was commissioned in the year 1986 and is the first of its kind in the country to operate both in operation and pumping mode since 1987. In this Power House the off peak energy is utilized to pump water to the upper reservoir and during peak hours the Power House is put in generation mode.

Open-loop Pumped Hydro Storage