Puffball is a privately owned earth dam located in Powder River, Wyoming, with a primary purpose of providing fire protection, stock water, and a small fish pond. Built in 1967 by designer Clifford J Sanders, this structure stands at a height of 27 feet and has a storage capacity of 122 acre-feet. Despite its low hazard potential and fair condition assessment, Puffball is regularly inspected by the state regulatory agency to ensure its safety and compliance with regulations.

Situated on the South Prong Deadman Creek, Puffball serves as a critical water resource in Sheridan County, Wyoming, supporting various agricultural and recreational activities in the region. The dam features an uncontrolled spillway with a width of 14 feet and no outlet gates. With a surface area of 7 acres and a drainage area of 0, Puffball plays a crucial role in water management and conservation efforts in the area.

Although Puffball has a moderate risk assessment rating, the dam remains a valuable asset for the community, providing essential water storage and fire protection capabilities. With regular inspections and maintenance, Puffball continues to serve as a vital infrastructure for the residents of Powder River, Montana, and surrounding areas.