To the west of it is an intake structure with four remotely controlled intake gates. From the intake structure the 4,000-foot-long (1,219 m), 7-foot-3-inch-diameter (2.2 m) Tunnel No.2 conveys the water from the lake to a 37-foot-diameter (11.2 m) forebay/surge chamber. From the forebay/surge chamber two steel penstocks carry the water down to the powerhouse which is located on Hydro Rd (S.H.3), Mangorei.
