Lake Las Vegas in Henderson, Nevada, refers to a 320-acre reservoir and the 3,592-acre developed area around the reservoir. The area is sometimes referred to as the Lake Las Vegas Resort. It is being developed by 5 companies including Lake at Las Vegas Joint Venture LLC.The area includes three resorts including the Aston MonteLago Village Resort, the Westin Lake Las Vegas Resort, and the Hilton Lake Las Vegas.
The dam that creates the reservoir is "an earthen structure 18 stories high, 4,800 ft in length and 716 ft wide at its base. It contains roughly the same amount of dirt as Hoover Dam does concrete," and was completed in 1991. The Las Vegas Wash passes under the reservoir and dam in pipes that require maintenance every 10 years.
Wikipedia https://en.wikipedia.org/wiki/Lake_Las_Vegas
Address 89011, United States
Coordinates 36°6'56.974" N -114°55'3.368" E