Parbati 520 MW Hydro Electric Power Project was executed with JB-19 Rebar Couplers of Size 25mm, 28mm, 32mm & 36mm. with the Construction Company Patel Engineering Limited at Barshaini Site for Main Dam Works & With the sizes of 16mm, 20mm, 25mm, 28mm, 32mm,36mm with the construction Company Gammon India Limited at Sainj Site for Power House , Piles & Allied works, during the years 2010- 2016.