Lake Moeris
During the Sixth Dynasty (2345–2181 BC) the power of pharaoh gradually weakened in favor of powerful nomarchs (regional governors). These no longer belonged to the royal family and their charge became hereditary, thus creating local dynasties largely independent from the central authority of the Pharaoh. However, Nile flood control was still the subject of very large works, including especially the canal to Lake Moeris around 2300 BC, which was likely also the source of water to the Giza pyramid complex centuries earlier.