One of the most crucial instruments for designing safe and cost-effective constructions is geotechnical analysis of geomaterials. In order to conduct geotechnical investigations for the purpose of building dams, three cases from various regions of India are presented in this study. The first case study involved the construction of an earth and rockfill dam 135 m high in the northeastern region of India. In order to determine the geotechnical qualities of the geomaterials (mostly soil) from the three potential borrow sites and determine their acceptability and quantity for the core material, three potential borrow area locations were chosen close to the dam site to assess the suitability and quantity available for the core material. A second case study was conducted in the central region of India, and a thorough borrow area assessment was done to see whether the construction materials would be suitable for a dam. The third case study involved the construction of a dam in Andaman and Nicobar Island, as well as a detailed borrow region where studies were conducted to determine whether building the dam’s core would be appropriate. The materials used in the borrow area were put through several tests. The results of these tests show that there is a significant amount of variation in the types of soil samples from all borrow areas.