The Siang valley on the Brahmaputra river has 17,000 MW of hydel power potential, according to some estimates. The 1,500-MW Nathpa Jhakri project is the largest operational hydropower project in India.
A senior power ministry official said Arunachal Pradesh government has expressed concerns over the impact such a big project would have on the state's infrastructure. He said NTPC was conducting the field studies at its own cost.
National Thermal Power Corporation had earlier shelved two projects in Arunachal Pradesh - 4,000 MW Etalin and 500 MW Attunli - after conducting feasibility studies as the state demanded an upfront payment of Rs 5 lakh per MW of electricity produced.
NTPC's first hydropower project at Koldam in Himachal Pradesh is likely to be commissioned next year. The company is also working on a 520 MW hydel project in Uttarakhand. The company is aiming to raise its power generation capacity to 50,000 MW by 2012 from the present 34,000 MW.
Source- Economic Times