Located in Broomfield, Colorado, McKay Lake - South is a man-made reservoir primarily used for water supply and recreation purposes. Built in 1900, this earth dam stands at a height of 13 feet and has a storage capacity of 445 acre-feet. The reservoir covers a surface area of 67 acres and is fed by the Big Dry Creek-OS.

With a high hazard potential and moderate risk assessment rating, McKay Lake - South is regulated and inspected by the Colorado Division of Water Resources. Despite not having a current condition assessment rating, the dam undergoes regular inspections to ensure its structural integrity and safety. The dam features an uncontrolled spillway with a width of 178 feet, capable of handling a maximum discharge of 6,893 cubic feet per second.

Water resource and climate enthusiasts will appreciate McKay Lake - South for its historical significance, engineering design, and importance in providing water supply to the surrounding area. Its recreational opportunities and scenic surroundings make it a valuable asset for the community of Westminster and a key feature in the local water management infrastructure. With proper maintenance and oversight, McKay Lake - South continues to serve its primary purpose while also offering recreational enjoyment for visitors.