Lake Las Vegas Dam, also known as Lake Adair, is a private dam located in Clark, Nevada, along the Las Vegas Wash. Completed in 1991, this earth dam stands at a height of 133 feet and serves primarily for recreational purposes, with a storage capacity of 10,600 acre-feet. The dam's spillway is of the controlled type, with a width of 300 feet, and it has a significant hazard potential with a fair condition assessment.

Designed by firms like KIMLEY-HORN and RBF CONSULTING, Lake Las Vegas Dam has a hydraulic height of 123 feet and a structural height of 165 feet. Although the dam is privately owned, it is regulated by the Nevada DWR, with state permitting, inspection, and enforcement in place. With a very high risk assessment rating and meeting guidelines, the dam's emergency action plan is regularly updated to ensure public safety in case of emergencies, making it a crucial infrastructure for water resource and climate enthusiasts to monitor and study in the region.