The Periyar River is a crucial waterway located in the southern Indian state of Kerala. It originates from the Western Ghats and flows through the Idukki district, eventually merging with the Periyar River. The Mullaperiyar Dam, built on this river, is of significant importance as it serves as a major water source for both Kerala and the neighboring state of Tamil Nadu. However, this dam has been a subject of controversy and disputes between the two states due to concerns about its safety and water-sharing arrangements.