The Jaldhaka River, also known as the Dichu, begins its journey at Bitang/Kupup Lake in Sikkim's Gangtok District, near Jelep La. After its ascent in Sikkim, the river traverses approximately 40 km through Bhutan's Samtse District before crossing into India at Bindu, the final village of North Bengal situated on the Indo-Bhutan frontier. From this point, the river surges southward through a confined, timbered gorge, gaining both breadth and speed as it moves past Jhalong and its iconic power station.