Parks No. 1 is a privately-owned irrigation dam located in Campbell, Wyoming, along Trail Creek. Built in 1915, this Earth dam stands at 34 feet high and spans 393 feet in length, with a storage capacity of 172 acre-feet. Despite its low hazard potential, the dam is currently rated as unsatisfactory in condition assessment, indicating a need for maintenance or repair.

The dam features a single valve outlet gate and an uncontrolled spillway with a width of 500 feet, serving its primary purpose of irrigation. While the dam has passed state inspections for permitting, enforcement, and regulatory compliance, its risk assessment is moderate, with a risk level of 3. The last inspection in July 2020 highlighted the dam's need for attention, suggesting potential vulnerabilities in the event of an emergency.

Situated in picturesque surroundings near Powder River, this historic structure serves as a vital resource for water management in the region. With its unique design and historical significance, Parks No. 1 presents both challenges and opportunities for conservationists and climate enthusiasts seeking to ensure the safety and sustainability of water resources in the area.