 chirgaon majhgaon hep chirgaon majhgaon hep gayathri mon 6192023 1229 chirgaon majhgaon hep has been allotted to hppcl by government of himachal pradesh gohp on 8012007 for execution in the state sector the project has been contemplated as a power generation development on pabbar river in shimla district of himachal pradesh it envisages utilization of water through average gross head of 21849 m for generation of 52 mw of power in a surface power house near village shaktinagar rohru the project comprises construction of diversion barrage of 1600 m height with 2 nos radial type under sluice gates each of size 8mx6m to discharge the design flood of the order 4000 cumec intake structure to draw 3634 cumecs discharge through 2 nos openings of size 275 m x 225 m each desilting arrangement 2 no chamber each of 90 m long 15 m wide 810 m deep for exclusion of silt particles down to 25 mm size desilted water passes through 10312 km long hrt 375 m dia horse shoe type to surge shaft of 100 m dia carrying water further to 58075 m long 310m dia penstock bifurcating into 220 m dia branch penstocks to feed 26 mw turbines seated in surface power house on the right bank of pabbar river near village shaktinagar rohru 40 m x 33 m rectangular 85945 m long trt carries the discharge from turbine back to the pabbar river the project is proposed to generate 18547 mu of electrical energy in 90 dependable year capacity 52mw design energy in 90 dependable year 18547 mu gross head 21849 m diversion structure diversion barrage of 16 m height head race tunnel 10312 km long hrt 375 m dia horse shoe type penstock pressure shaft 58075 m long 310m dia penstock circular power house surface 2 x 26 mw francis turbines village chirgaon tehsil rohru district shimla state himachal pradesh under investigation preconst clearances stage 1325 mw  yamuna pabbar shimla hp 60 mw  