Complex sentence: Following this treaty, India prepared a master plan to utilize the waters of 3 rivers which came to its share and the Bhakra Dam was constructed across Satluj River and then the Beas River was tapped in two stages with the Pong dam forming the second stage development.
Split into simpler sentences: Following this treaty, India prepared a master plan to utilize the waters of 3 rivers which came to its share. Then, the Beas River was tapped in two stages, with the Pong Dam forming the second stage development.