Big Monitor #1 is a privately owned dam located in Montrose, Colorado, specifically in the city of DELTA. Built in 1946 for irrigation purposes, this earth dam stands at a height of 19 feet with a hydraulic height of 20 feet. With a maximum storage capacity of 107 acre-feet and a normal storage of 80 acre-feet, this structure plays a crucial role in managing water resources in the area. Despite being classified as low hazard potential with a fair condition assessment, the dam poses a high risk due to its location and age.

Situated on the ROUBIDEAU CREEK-TR, Big Monitor #1 is regulated by the state of Colorado with permitting, inspection, and enforcement conducted by the Department of Water Resources (DWR). The dam has a spillway width of 10 feet and is equipped with flap and uncontrolled outlet gates. Even though it does not have an inundation map prepared or an emergency action plan (EAP) in place, the dam undergoes inspections every 6 years to ensure its safety and functionality. With a high risk assessment rating of 2, it is essential for stakeholders and authorities to closely monitor and manage the risks associated with this structure.

As a vital component of the local irrigation system, Big Monitor #1 serves as a key water resource for agricultural activities in the region. Its stone core and rock-soil foundations support a dam length of 280 feet, providing a surface area of 9 acres. With a maximum discharge capacity of 161 cubic feet per second, this dam plays a crucial role in water management and distribution. As climate change continues to impact water resources, it is imperative to safeguard and maintain structures like Big Monitor #1 to ensure sustainable water usage and security for the future.