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Past Flooding in the Las Vegas Valley
The recorded reports of flooding in the Las Vegas Valley date back almost one hundred years. From 1905 to 1975, 184 different flooding events resulted in damages to private property and public facilities. Since 1960, the area has experienced at least eight "million dollar floods." In that same period, 25 lives were lost in twelve separate flash flood events.
In July 1999, torrential rains produced severe, and in some cases, unprecedented flash-flooding across the Las Vegas Valley. The resulting runoff from these rains caused widespread street flooding and record flows in normally dry washes and flood control detention basins (Sutko,1999). The floods caused over $20,000,000 in property damage and took two lives. Ultimately the storm forced millions of gallons of runoff to enter Lake Mead by way of Las Vegas Wash.