The Shanmuganathi Dam is located at the scenic backdrop of the Meghamalai Hills. It is constructed on the River Shanmugha at Rayapanpatty in Theni district. Places of Theni districts such as Appipatti, Vellaiammalpuram, Pusarikoundan Patti, Odaipatti, Sepalakottai and Sukkangal Patti are benefitted by the water of this dam.