It is a twin station with Ohau C and is part of the Waitaki hydro scheme which consists of eight power stations operated from a control centre near Twizel. Water from Lake Ruataniwha flows through Ohau B, then Ohau C and then through to Lake Benmore.
Martin, John E, ed. (1991). People, Power and Power Stations: Electric Power Generation in New Zealand 1880 - 1990. Wellington: Bridget Williams Books Ltd and Electricity Corporation of New Zealand. pp. 316 pages. ISBN0-908912-16-1.
Sheridan, Marion (1995). Dam Dwellers – End of an Era. Twizel: Sheridan Press. pp. 392 pages. ISBN0-473-03402-6.