Upper Blue is a rockfill dam situated in Breckenridge, Colorado, along the Monte Cristo Creek. Completed in 1965, this dam serves as a critical water supply source for the region, with a storage capacity of 2,635 acre-feet and a maximum discharge rate of 2,922 cubic feet per second. The dam stands at a height of 75 feet and has a spillway width of 60 feet, making it a vital structure for managing water resources in the area.

Owned and regulated by the local government, Upper Blue is inspected regularly to ensure its structural integrity and operational efficiency. The dam has a high hazard potential but is currently assessed to be in satisfactory condition. In case of emergencies, the dam is equipped with four valve outlet gates for proper water release. With a moderate risk assessment rating, Upper Blue plays a crucial role in mitigating water-related risks and ensuring a stable water supply for the community. Water resource and climate enthusiasts will find Upper Blue to be an essential infrastructure contributing to sustainable water management in Summit County, Colorado.