Sullivan is a privately owned dam located in Moffat County, Colorado, near the city of Craig. Built in 1951, it serves primarily for irrigation purposes on Cedar Creek. The dam stands at a height of 30 feet, with a hydraulic height of 35 feet and a structural height of 39 feet, containing a storage capacity of 64 acre-feet for water resource management. Despite its age, the dam is in fair condition with a low hazard potential, as assessed in 2016.

The Sullivan dam does not have any associated structures and is regulated by the Colorado Division of Water Resources, with state jurisdiction, permitting, inspection, and enforcement in place. It spans 355 feet in length and has a spillway width of 22 feet for uncontrolled water discharge. The risk assessment for the dam is moderate, with a risk level of 3, indicating the need for ongoing monitoring and potential risk management measures. The latest inspection took place in October 2016, with a recommended inspection frequency of every 6 years to ensure the safety and integrity of the structure for both water management and climate resilience in the region.