Amelia No. 1 is a privately owned dam located in Niobrara, Wyoming, along Alum Creek. Built in 1961, this Earth dam stands at a height of 24 feet and has a maximum storage capacity of 125 acre-feet. The primary purposes of this dam are for fire protection, stock watering, and as a small fish pond, serving the local community in Edgemont, SD.

Despite its low hazard potential and moderate risk assessment, Amelia No. 1 is currently in poor condition according to the last inspection conducted in May 2018. The dam features an uncontrolled spillway with a width of 275 feet and one other controlled outlet gate. With a drainage area of 15.8 square miles and a surface area of 10 acres, this dam plays a crucial role in managing water resources in the region.

For water resource and climate enthusiasts, Amelia No. 1 presents an intriguing case study of a privately owned dam that serves multiple purposes while facing maintenance challenges. Its location in a scenic area along Alum Creek adds to its significance, making it a focal point for water management discussions in Wyoming. As efforts continue to ensure its safety and functionality, Amelia No. 1 remains a key feature in the local water infrastructure landscape.