This led to Contact Energy and the government purchasing flood affected properties and flood easements over others as well as constructing a flood bank. Contact Energy has also introduced a program of drawing down the lake level during floods in an attempt to move flush sediment downstream. Between 1956 and 1979 the maximum operating level of Lake Roxburgh had been 132.6 m before being reduced to 132 m. In December 2009 Contact Energy was given permission by the Otago Regional Council to return to a maximum operating level of 132.6 m. This would increase the amount of electricity that the power station could generate. When Contact Energy's application was heard in October 2009 14 submissions were received on the application, eight in opposition, five in support and one neutral. The approval of an increased operating level came with the conditions to ensure that the power station's discharge flow matched naturally occurring flood flows. When the flow reaches , the level of Lake Roxburgh has to be lowered to below 132 m, by either releasing less water at Clyde Power Station or increasing the flow through Roxburgh power station. Other conditions addressed mitigating the affects on amenity areas and walking track as well as the protocols to be followed if historic artefacts are found. Since 2012 a trap and transfer programme and transported elvers (juvenile eels) around the power station. 2016 report Gallery See also List of power stations in New Zealand Electricity sector in New Zealand Notes References External links Contact Hydro: Clyde, Roxburgh, Hawea A Retrospective on Generator Failures System for Automatically Closing Fire Doors in a Powerhouse Dams completed in 1957 Dams in New Zealand Buildings and structures in Otago Clutha River 1950s architecture in New Zealand