Pumping and simultaneous pumping test data from large diameter wells in hard rock formations were analyzed for estimation of radius of influence. The radius of influence is estimated by Papadopulos and Cooper (1967) and Boulton and Streltsova (1976) methods. The results obtained were compared with twice saturated thickness and the distance between the pumped well and nearby wells. The results revealed that the radius of influence estimation by Papadopulos and Cooper (1967) and Boulton and Streltsova (1976) methods ranges from 32.22 to 95.0 m. The well inference was observed at distance of 52.6 m from pumped well. The twice the saturated thickness of aquifer is higher than the estimated values of radius of influence.