Y and S is a privately owned irrigation dam located in Cedaredge, Colorado, along the Surface Creek. Completed in 1959, this earth dam stands at a height of 27 feet and has a storage capacity of 246 acre-feet. With a normal storage level of 190 acre-feet, the dam covers a surface area of 14 acres and has a maximum discharge capability of 494 cubic feet per second.

Although Y and S is categorized as having low hazard potential and fair condition assessment, it is subject to state regulation, inspection, and enforcement. The dam is equipped with a slide (sluice gate) and uncontrolled outlet gates, and has a spillway width of 20 feet. Despite its relatively low risk rating, the dam is considered to have a high risk assessment level of 2, indicating a need for continued monitoring and management.

Owned by a private entity, Y and S serves primarily for irrigation purposes and is situated within the jurisdiction of the Colorado Division of Water Resources. With its strategic location in Delta County, this dam plays a crucial role in water resource management in the region and serves as a vital infrastructure for the local agricultural community.