Tucker Lake - South Dam, located in Arvada, Colorado, is a privately owned earth dam built in 1899 for irrigation purposes. Managed by the USDA NRCS, this dam stands at a height of 29 feet and has a storage capacity of 1,250 acre-feet. With a surface area of 56 acres and a spillway width of 20 feet, the dam plays a crucial role in regulating the flow of Ralston Creek-OS.

Despite being in satisfactory condition, Tucker Lake - South Dam has a high hazard potential, prompting regular inspections by the state regulatory agency. With a moderate risk assessment rating, emergency action plans are in place to ensure the safety of downstream communities in the event of a breach. As a significant water resource in Jefferson County, this dam serves as a testament to the enduring legacy of water management in Colorado and the importance of maintaining infrastructure in the face of climate challenges.