 kashang stage iv kashang stage iv gayathri mon 6192023 1407 capacity 48 mw design energy in 90 dependable year design head diversion structure head race tunnel penstock pressure shaft power house village near lippa village tehsil reckong peo district kinnaur state himachal pradesh under investigation preconst clearances stage 1325 mw  satluj kerang khad kinnaur hp 48 mw  