 The water which rotates the turbines goes through the forests in to Parambikulam Dam in Kerala.This water is brought back from Kerala to Tamil Nadu via a tunnel and then the Contour Canal (சமமட்டக் கால்வாய்) which ends up in Upper Aazhiyaar dam.Valparai is at a distance of from Pollachi; from Udumalaipettai; from Coimbatore; from Dharapuram; from Tiruppur; from Munnar; from Chalakudy; from Nelliampathi; from Palakkad; from Thrissur.