Treesdale Impoundment #1, located in Adams Township, Butler County, Pennsylvania, is a privately owned earth dam primarily used for recreation purposes. Managed by the Pennsylvania Department of Environmental Protection, this dam on the TR Breakneck Creek has a height of 15 feet and a storage capacity of 82 acre-feet. With a surface area of 2.3 acres and a normal storage of 17 acre-feet, the dam serves to reduce flood risks in the area while also providing recreational opportunities for the community.

Despite its fair condition assessment and high hazard potential, Treesdale Impoundment #1 has been regularly inspected, with the most recent inspection taking place in September 2020. The dam is state-regulated and permitted, ensuring compliance with safety standards and enforcement measures. While there have been no modifications or emergency action plans reported, the dam's design as an earth dam with buttress core types reflects a stable and reliable structure for water resource management and climate resilience in the region. As a part of the Pittsburgh District, this impoundment plays a crucial role in water management and recreational activities for the local community.