in 2008, mighty river increased its generating capacity by opening the 100 mw kawerau geothermal power station, increasing supply security to the eastern bay of plenty, a large timber processing area. in 2010, it opened the 140 mw nga awa purua geothermal station near taupo, complete with the largest single-shaft geothermal turbine in the world. the commissioning of nga awa purua increased mighty river's geothermal capacity to 385 mw, becoming the nation's largest geothermal electricity generator with 52.7 percent of all installed geothermal capacity.