It is a popular misconception that these lakes are filled via the Nepean River but they are actually filled via rain water and ground water. When the Nepean River floods, the lakes system can act as a weir. A Penrith Lakes Scheme Concept Plan is currently under review to ensure the site delivers a wide range of environmental, social, cultural and economic values. PLDC has established a community advisory committee (CAC) which will meet regularly and provide advice on the ongoing planning and development of the lakes scheme.