Elk Wallows, also known as Twin Sisters, is a privately owned irrigation reservoir located in Hotchkiss, Colorado. Built in 1903, this earth dam structure stands at a height of 22 feet and has a length of 2600 feet, providing storage of 243 acre-feet of water for irrigation purposes. The dam is regulated and inspected by the Colorado Department of Water Resources, ensuring its safety and compliance with state regulations.

Despite its age, Elk Wallows is considered to have a low hazard potential and is in fair condition as of the last inspection in 2015. The reservoir serves as a critical water supply source for the local area, with a normal storage capacity of 167 acre-feet. With its stone core and soil foundation, this dam plays a vital role in supporting agriculture and water management in the region.

Located along Leroux Creek-TR, Elk Wallows plays a crucial role in water resource management in Delta County, Colorado. Its strategic positioning and historical significance make it a key feature in the local landscape, providing essential irrigation water for the surrounding agricultural lands. As climate change continues to impact water availability, structures like Elk Wallows will become increasingly important in sustainable water management practices for the future.