Upper Tule Lake, also known as Tule #1, is a private water resource located in Littleton, Colorado. Built in 1892, this earth dam serves multiple purposes including irrigation and recreation, with a primary focus on recreation. The dam stands at a height of 11 feet and has a storage capacity of 204 acre-feet, providing vital water resources for the surrounding area.

Managed by the Colorado Department of Water Resources, Upper Tule Lake is regulated and inspected regularly to ensure its structural integrity and safety. With a significant hazard potential but a satisfactory condition assessment, the dam poses a moderate risk level. The spillway, with a width of 127 feet, is uncontrolled, allowing for the discharge of up to 2302 cubic feet per second in times of high water flow. The dam's location on the South Platte River adds to its importance in managing water resources in the region.

Water and climate enthusiasts can appreciate Upper Tule Lake for its historical significance, engineering marvel, and important role in water management. With its picturesque surroundings and recreational opportunities, this private dam serves as a valuable asset for both locals and visitors alike. As climate change continues to impact water resources, the maintenance and regulation of structures like Upper Tule Lake become increasingly crucial in ensuring sustainable water management practices for the future.