Cortez #1 is a vital earth dam located in Colorado, specifically in Montezuma County near the city of Cortez. Completed in 1938, this dam serves the primary purpose of providing water supply, with a capacity to store up to 145 acre-feet of water. With a height of 38 feet and a structural height of 44 feet, Cortez #1 plays a significant role in managing water resources in the region.

Managed by the local government and regulated by the Colorado Department of Water Resources, Cortez #1 has been designated as a state-regulated structure. The dam's condition was last assessed as fair in October 2020, with a significant hazard potential and a moderate risk assessment rating. Despite the need for regular inspections and maintenance, Cortez #1 continues to play a crucial role in water management and supply in the area, ensuring the safety and reliability of its operations.

With an uncontrolled spillway and valve outlets, Cortez #1 is equipped to handle a maximum discharge of 253 cubic feet per second. The dam's location on the McElmo Creek-TR river system adds to its importance in water resource management. As an essential part of the region's infrastructure, Cortez #1 stands as a testament to the ongoing efforts to safeguard and optimize water resources in Colorado.