 surgani sundla hep surgani sundla hep gayathri mon 6192023 1204 the surgani sundla hep is envisaged as a runof river scheme on siul river a tributary of river ravi in chamba district of hp it is a downstream development of bairasiul hep 180mw which is under operation with nhpc the project envisages utilization of silt free water available from the tail race outfall of bairasiul hep 180mw with 7718 m gross head to generate 48 mw of power in a surface power house located near village majra on the right bank of siul river it is expected to generate 20960 mu of electricity in 90 dependable year capacity 48 mw design energy in 90 dependable year 20960 mu gross head 7718 m diversion structure rectangular open channel 2810 m 80 m x 400 m 61 m in length head race tunnel concrete lined modified horse shoe tunnel 620 m dia finished 7430 m in length penstock pressure shaft underground surfaced circular 505 m dia 149 m in length power house surface 6000 m x 1500 m village maira tehsil salooni district chamba state himachal pradesh nearest access chambatissa state highway under investigation preconst clearances stage 1325 mw  ravi siul chamba hp 48 mw  