Sunny Brook, located in Lamar, Colorado, is a privately owned dam with a primary purpose of irrigation. Completed in 1915, this Earth dam stands at a height of 20 feet and has a length of 910 feet. With a storage capacity of 144 acre-feet and a normal storage of 81 acre-feet, Sunny Brook serves as a crucial resource for water management in the area.

Despite being categorized as having a low hazard potential, Sunny Brook is considered to have a high risk level due to certain factors. While the dam has not been inspected since 1979 and is currently rated as "Not Rated" in terms of condition assessment, it is still regulated, inspected, and enforced by the State agencies to ensure public safety and compliance with regulations. With a drainage area of 0 square miles and a maximum discharge of 1259 cubic feet per second, the dam plays a key role in managing water flow in the Arkansas River-OS.

As a significant structure in the region, Sunny Brook represents a blend of historical significance and modern-day water resource management. With its unique design and functional purpose, the dam stands as a testament to the importance of efficient irrigation systems in sustaining agricultural practices and mitigating the impact of climate change on water resources.