Bull Basin #1, also known as Big Bull Basin, is a privately owned earth dam located in Mesa County, Colorado. Completed in 1920, this structure serves primarily for irrigation purposes along Bull Creek. With a height of 20 feet and a storage capacity of 177 acre-feet, the dam plays a crucial role in water management in the region.

The dam has a low hazard potential and is assessed to be in fair condition as of the last inspection in July 2020. Despite its age, Bull Basin #1 continues to fulfill its intended functions effectively. The surrounding area has a moderate risk level of 3, indicating the importance of proper risk management measures to ensure the safety and integrity of the dam.

Managed by the Colorado Department of Water Resources, Bull Basin #1 stands as a testament to the enduring importance of water resource infrastructure in sustaining agricultural activities and environmental health in the region. Its presence along Bull Creek contributes to the overall water management efforts in Mesa County, highlighting the interconnected relationship between water resources and climate resilience in this arid region.