Leggett & Hillcrest is a private dam structure located in Boulder, Colorado, along the South Boulder Creek. Built in 1917, this earth dam stands at 28 feet high and spans a length of 2460 feet, with a storage capacity of 15,950 acre-feet. The dam primarily serves the purpose of water supply for irrigation and other domestic purposes in the region, with a normal storage capacity of 11,234 acre-feet.

The dam's hazard potential is classified as high, but its condition assessment as of November 2020 is satisfactory. Despite being state-regulated and permitted, with inspections and enforcement in place, the risk assessment for potential emergencies is rated as moderate. The dam's spillway, which is uncontrolled, has a width of 108 feet, and the maximum discharge capacity is reported at 6,752 cubic feet per second. With a risk management plan in place, Leggett & Hillcrest remains a crucial infrastructure for water resource management in the area, amidst growing concerns of climate change impacts on water availability and security.

Being a significant structure in the region, Leggett & Hillcrest plays a vital role in ensuring water supply for irrigation and domestic needs. As water resource and climate enthusiasts, understanding the complexities and risks associated with such infrastructure is crucial for sustainable water management practices. With proper maintenance, monitoring, and emergency preparedness, Leggett & Hillcrest continues to serve its purpose effectively, contributing to the overall water security of the Boulder, Colorado area.