The six steel pipes drop 584 metres to the power station below. The pipes get narrower as they descend, forcing the water at higher pressure onto the turbines. At the top, the pipe diameter is 1525mm decreasing to 1220mm at the bottom.br/br/The water which powers the Tarraleah power station covers 26km overland (via canal, syphons and pipe) from the Butlers gorge, and ends in the Nive River.