Holbrook, also known as Lake Canal #1, is a privately owned irrigation reservoir located in Cheraw, Otero County, Colorado. Built in 1890, this earth dam stands at a height of 25 feet and has a length of 3168 feet, with a maximum storage capacity of 10138 acre-feet and a normal storage level of 6258 acre-feet. The reservoir covers a surface area of 660 acres and is primarily used for irrigation purposes, with some recreational activities also taking place.

Managed by the Colorado Division of Water Resources, Holbrook is regulated, permitted, inspected, and enforced by the state agency to ensure its safety and operational efficiency. The dam has an uncontrolled spillway with a width of 2355 feet and a maximum discharge capacity of 10110 cubic feet per second. Despite being classified as having a significant hazard potential, the dam's condition is assessed as satisfactory, with regular inspections and maintenance carried out to mitigate risks and ensure public safety. The reservoir's risk assessment is moderate, with a rating of 3 out of 5.

Holbrook plays a crucial role in supporting agricultural activities in the region by providing a reliable water supply for irrigation. Its historical significance, combined with its function as a key water resource, makes it a valuable asset in the management of water resources and climate adaptation efforts in the area. Enthusiasts interested in water management and climate resilience will find Holbrook to be a fascinating example of how infrastructure like dams can contribute to sustainable water use and environmental stewardship in the face of changing climatic conditions.