Located in Pinal, Arizona, the Powerline structure serves as a crucial element in flood risk reduction along the Magma Wash river. With a dam height of 32 feet and a length of 13,398 feet, this earth dam designed by USDA NRCS in 1967 stands as a testament to engineering ingenuity. Despite its impressive size and capacity, the dam is classified as having a high hazard potential, prompting regular inspections and maintenance to ensure its structural integrity.

Owned by the local government and regulated by the Arizona Department of Water Resources, Powerline plays a vital role in safeguarding the surrounding area from potential flooding events. With a storage capacity of 5,100 acre-feet and a maximum discharge of 25,000 cubic feet per second, the dam provides essential flood protection for the community of Mesa/Apache Junction. Its uncontrolled spillway and outlet gates are designed to mitigate the risk of overflow and ensure the safety of downstream areas.

While Powerline currently holds a fair condition assessment, its risk potential is classified as moderate. The dam's hazard level and the surrounding environment necessitate a stringent risk management approach to mitigate potential dangers. As water resource and climate enthusiasts, understanding the significance of structures like Powerline sheds light on the intricate balance between harnessing water resources for human benefit while protecting against potential hazards.