Two Buttes, also known as W.D. Purse Reservoir No. 1, is a state-regulated earth dam located in Baca County, Colorado. Completed in 1908, this reservoir serves primarily for recreation, with a focus on fish and wildlife pond activities. With a maximum storage capacity of 40,654 acre-feet and a normal storage of 22,165 acre-feet, Two Buttes covers a surface area of 1,182 acres and has a drainage area of 470 square miles.

Despite its historical significance, Two Buttes poses a high hazard potential and has been assessed as unsatisfactory in terms of its condition. With a hydraulic height of 63 feet and a structural height of 106 feet, the reservoir features an uncontrolled spillway with a width of 300 feet. The dam's maximum discharge capacity is 46,200 cubic feet per second, making it critical for emergency management and risk assessment in the region. As water resource and climate enthusiasts, it is essential to recognize the importance of maintaining and monitoring structures like Two Buttes to ensure the safety and sustainability of our water resources.