S. Lazy U, located in Hinsdale, Colorado, along Crooked Creek, is a privately owned dam that serves primarily for recreational purposes. Built in 1933, this earth dam stands at a height of 11 feet and has a length of 240 feet, providing a storage capacity of 245 acre-feet. With a surface area of 32 acres and a drainage area of 6 square miles, S. Lazy U offers opportunities for fish and wildlife pond activities and other recreational pursuits.

Despite its age, S. Lazy U has been regularly inspected by the appropriate state regulatory agency, with the last assessment in July 2015 revealing a fair condition. The dam has a low hazard potential, but a high risk assessment due to its location and surrounding factors. The dam does not have a spillway and operates with a spillway width of 13 feet. With its picturesque setting and historical significance, S. Lazy U continues to be an important water resource for the community and a site for outdoor enthusiasts to enjoy.