Sly Park, also known as Jenkinson Lake, is a public utility water resource located in El Dorado County, California. This reservoir on Sly Park Creek serves multiple purposes, including irrigation, recreation, and water supply. The earth dam, completed in 1955, stands at 182 feet tall and has a storage capacity of 41,000 acre-feet. With a surface area of 677 acres and a drainage area of 17.2 square miles, Sly Park plays a crucial role in water management in the region.

Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Sly Park has a high hazard potential but is currently assessed as satisfactory in condition. Regular inspections are conducted to ensure the dam's safety and integrity. The reservoir's primary purpose is water supply, providing essential resources for the surrounding communities. Located in Nashville, California, Sly Park offers a scenic and recreational destination for visitors to enjoy water-based activities and picturesque views.

With a congressman representing the area as Tom McClintock (R), Sly Park is under state regulatory oversight, with permitting, inspection, and enforcement handled by the appropriate agencies. The dam's emergency action plan is regularly updated, and measures are in place to manage risks associated with its operation. Water resource and climate enthusiasts will find Sly Park to be an interesting case study in water management, dam safety, and the importance of sustainable water supply in California's diverse landscape.