St. Marys, located in Apache County, Arizona, is a state-regulated dam owned by the Arizona Department of Water Resources. Built in 1925, this earth dam stands at 7 feet tall and stretches 363 feet in length, with a storage capacity of 124 acre-feet. The primary purpose of St. Marys is to serve as a Fish and Wildlife Pond along Rudd Creek, providing vital habitat for local wildlife.

Despite its low hazard potential, St. Marys is considered to have a high risk level (2) according to a risk assessment. While the condition of the dam is not rated, it undergoes inspections every 5 years to ensure its structural integrity. The dam does not have a spillway and is not associated with any federal agencies, highlighting the local and state-level importance of its management and maintenance.

For water resource and climate enthusiasts, St. Marys represents an essential piece of infrastructure in the Springerville area, playing a crucial role in supporting the local ecosystem and wildlife. As an earth dam with a focus on fish and wildlife habitat, it stands as a testament to the balance between human development and environmental conservation in the region. Further monitoring and management will be essential to ensure the continued safety and functionality of this important water resource in Arizona.