Haystack is a privately owned Earth dam located in Sedalia, Colorado, along the West Plum Creek. Completed in 1964, this recreational dam stands at 22 feet tall and spans 360 feet in length, with a storage capacity of 56 acre-feet. The dam's primary purpose is for recreation, offering a surface area of 6 acres for activities such as fishing and boating. Despite being regulated and inspected by the Colorado Division of Water Resources, the dam's hazard potential is rated as low, with a high risk assessment due to its condition not being rated.

Although Haystack Dam has not been rated for its condition, its low hazard potential and high-risk assessment highlight the importance of regular inspections and maintenance to ensure its safety and functionality. With a maximum discharge capacity of 2292 cubic feet per second and a spillway width of 84 feet, the dam presents potential risks in the event of heavy rainfall or flooding. While the dam does not have a designated Emergency Action Plan (EAP) or inundation maps prepared, it remains under the jurisdiction of the state of Colorado and is subject to regulatory oversight to mitigate any potential risks posed by its structure.

Water resource and climate enthusiasts interested in the management and maintenance of dams like Haystack will find this structure to be a blend of recreational and regulatory oversight. Despite its low hazard potential, the high-risk assessment underscores the importance of proactive risk management measures to ensure the safety of the surrounding community and environment. As a significant feature in the region's water infrastructure, Haystack Dam serves as a focal point for ongoing monitoring and assessment to uphold its structural integrity and operational effectiveness in the face of changing climatic conditions and potential natural hazards.