Upper Derby, also known as Upper Derby Lake, is a federal-owned dam located in Commerce City, Colorado. Built in 1942 by the US Army, the primary purpose of this earth and gravity dam is flood risk reduction, with a dam height of 15 feet and a length of 1400 feet. It has a storage capacity of 620 acre-feet and covers an area of 87 acres, serving as a crucial structure for managing water resources in the region.

Managed by the US Army Corps of Engineers, Upper Derby is regulated, inspected, and enforced by various state agencies to ensure its structural integrity and safety. The dam has a significant hazard potential and underwent structural modifications in 1973. Despite its age, specific details on the condition assessment and emergency action plan are not currently available, highlighting the importance of ongoing monitoring and maintenance for this vital water resource infrastructure.

Located within Congressional District 07, Upper Derby plays a key role in mitigating flood risks and protecting surrounding communities. With its historical significance and ongoing management by federal and state agencies, this dam serves as a crucial component of the water resource and climate resilience efforts in Adams County, Colorado.