Falxa No. 1 is a privately owned earth dam located in Johnson County, Wyoming, specifically in the city of Arvada. Built in 1958, this dam serves multiple purposes including fire protection, stock watering, and creating a small fish pond. With a height of 25 feet and a length of 255 feet, it has a storage capacity of 73 acre-feet and covers a surface area of 6 acres.

Despite its low hazard potential, Falxa No. 1 is currently in poor condition, as indicated by a recent inspection in August 2021. Its spillway type is uncontrolled, with a width of 40 feet, and it lacks outlet gates. The dam is regulated by the Wyoming State Engineer's Office and undergoes regular inspections every 5 years. While the risk assessment deems it to have a moderate risk level, there is no emergency action plan in place, raising concerns for potential safety issues in the event of a dam failure. For water resource and climate enthusiasts, monitoring the condition and maintenance of Falxa No. 1 is vital to ensure the safety and sustainability of this important water resource infrastructure.