During the 2008 irrigation off-season, GMW lowered Lake Mulwala to treat aquatic weeds.
This was the first time GMW had tried this method, with the rationale being that exposing the weeds to the cold winter weather would help kill them off.
Aquatic weed experts were commissioned to assess the effectiveness of the drawdown.
The method proved highly successful and has been used several times since to manage aquatic weeds in the storage.