Simmons is a privately owned dam located in Johnson, Wyoming, along the Simmons Draw River. Built in 1962, this earth dam stands at 25 feet high and serves multiple purposes including fire protection, stock watering, and small fish pond management. With a storage capacity of 49 acre-feet, the dam covers a surface area of 3 acres and has a spillway width of 80 feet. Despite having a low hazard potential and fair condition assessment, the dam is regulated by the Wyoming State Engineer's Office with regular inspections and enforcement measures in place.

The Simmons dam plays a crucial role in water resource management in the region, providing essential services for both agricultural and ecological purposes. Its location in a congressional district represented by Liz Cheney underscores its importance in the local community. With a moderate risk assessment rating of 3 out of 5, the dam is subject to ongoing risk management measures to ensure its safe operation and prevent potential hazards. Although the dam has not undergone recent modifications, it is equipped with an uncontrolled spillway and lacks outlet gates.

Climate and water resource enthusiasts can appreciate the intricate details of the Simmons dam, from its construction history to its current operational status. As a key infrastructure for fire protection and irrigation, this dam exemplifies the intersection of human engineering and natural resource management. With its regulated status and regular inspections, Simmons stands as a model for responsible dam ownership and maintenance in the face of changing environmental conditions and increasing water demands.