In hydro electric projects, grouting plays an important role in controlling the seepage and improvement in rock strength for the construction of underground as well as surface structures. The Nathpa Jhakri Hydroelectric Power Station (NJHPS) 1500 MW, the largest hydropower station in India under operation, and downstream Rampur Hydro Electric Project (RHEP) 412 MW, presently under advanced stage of construction, and planned to run in tandem are both located on river Satluj in the Himalayan region. The extensive grouting operations carried out on these projects have been outlined in this paper.