Circle 2 Ranch Det. #1 is a privately owned earth dam located in Parker, Colorado, along Kinney Creek. Built in 1964 by USDA NRCS, this dam serves the primary purpose of flood risk reduction for the surrounding area. Standing at a height of 24 feet with a structural height of 29 feet, the dam has a storage capacity of 115 acre-feet and a normal storage of 70 acre-feet.

With a low hazard potential and satisfactory condition assessment as of 2007, Circle 2 Ranch Det. #1 has been inspected by the DWR and is under state regulation, permitting, and enforcement. Although the dam does not have a spillway, it has a spillway width of 130 feet and a maximum discharge of 3823 cubic feet per second. The risk assessment for this dam is rated as high (2), indicating the importance of continued monitoring and maintenance to ensure the safety and functionality of this critical infrastructure in the event of a flood event.