 At the end of 2011, the water law permit for the installation of a 5th turbine in the Rhine power plant Gambsheim was granted.This will increase the power plant capacity to 1420 m³/s.The additional turbine was pun into operation by 18 October 2013.
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The weir of the barrage in Iffezheim is situated on the French side of the Rhine, so that the whole barrage is approximately mirror-inverted to the next higher situated barrage Gambsheim.