1892: Tansa phase I to supply 77 mld water to Mumbai
1915: Tansa phase II to increase the supply to 82 mld

1925: Height of Tansa dam raised to increase water supply to 150 mld

1948: Tansa phase IV adds 181 mld water to Mumbai

1948 to 1957: Modak Sagar dam built across Vaitarna river to supply 490 mld water

1973: Upper Vaitarna dam built upstream of Modak Sagar to supply 544 mld water

1981 to 1998: Bhatsai project finished with a capacity of 1,365 mld