Located in Pinal, Arizona, Main Pls is a privately owned dam regulated by the Arizona Department of Water Resources. Completed in 2008, this Earth-type dam stands at a height of 106 feet and spans 800 feet in length, with a storage capacity of 600 acre-feet. The dam is situated on Powers Gulch and serves a primary purpose other than flood control or water supply.

With a significant hazard potential but a satisfactory condition assessment as of April 2018, Main Pls is an essential structure in managing water resources in the region. The dam's uncontrolled spillway and rock and soil foundations contribute to its functionality. Despite being privately owned, state regulations ensure that the dam is inspected, permitted, and enforced to meet safety standards, highlighting the importance of its role in water management and climate resilience efforts in Arizona.