When they said dam it they were talking about the Colorado, one of the most damned rivers anywhere. Parker Dam is one of them and it formed Lake Havasu. The name means blue lake in the Navajo language, which is funny because the lake water is a lovely sea green color. They must have named it before they filled it. As Cathy mentioned, Havasu is popular with poorly muffled speed boats. It is also full. A neighbor said it is always kept full as part of a water management agreement between Arizona and Colorado in concert with the Fed. Even in this drought period. Lake Mead and Lake Powell water levels are way down but Havasu is special. That does make it attractive, especially caught at the right light.