Reach 11 Detention Dike 1, located in Maricopa, Arizona, is a Federal-owned earth dam completed in 1977 by the Bureau of Reclamation with a primary purpose of flood control. This structure has a dam height of 35 feet and a hydraulic height of 29 feet, with a storage capacity of 19,500 acre-feet. The dam is designed with an arch core type and rests on a rock foundation, serving as a critical water resource management tool in the region.

The dam's hazard potential is rated as high, and its risk assessment is categorized as very high, emphasizing the importance of its maintenance and monitoring. Reach 11 Detention Dike 1 has three associated structures and is regulated by the Bureau of Reclamation. The dam's controlled spillway type further enhances its flood control capabilities, ensuring the safety of nearby communities and infrastructure during periods of heavy rainfall or runoff.

Despite its age, Reach 11 Detention Dike 1 continues to play a vital role in water resource management in the area, with regular inspections and emergency action plans in place to address any potential risks. As climate change continues to impact weather patterns and precipitation levels, structures like this earth dam are essential for safeguarding against flooding and protecting the local environment.