Sunnyside is a privately owned dam located in Huerfano County, Colorado, specifically in the city of Walsenburg. Completed in 1901, this Earth dam serves multiple purposes including fire protection, stock, and small fish pond irrigation. With a height of 24 feet and a length of 1100 feet, Sunnyside has a storage capacity of 223 acre-feet and a normal storage level of 163 acre-feet, covering a surface area of 12 acres.

The dam is regulated by the Colorado Department of Water Resources (DWR) and is subject to state permitting, inspection, and enforcement. Despite being rated as having a low hazard potential, Sunnyside is considered to have a high risk level (2) due to its location and surrounding factors. The dam does not have a spillway and its last inspection was conducted in April 1992, with the condition assessment currently marked as "Not Rated".

Water resource and climate enthusiasts may find Sunnyside to be an interesting case study in the management and maintenance of older dams for various purposes. The dam's location along the North Santa Clara Creek-OS and its historical significance as a water storage structure highlight the importance of ongoing monitoring and risk assessment to ensure the safety and functionality of such infrastructure in the face of changing environmental conditions and regulatory standards.