Deer Flat Lower is a federal-owned structure located in Parma and Wilder, Idaho, designed for irrigation purposes. Completed in 1907 by the Bureau of Reclamation, this earth dam stands at a height of 48 feet and spans a length of 7270 feet, with a maximum storage capacity of 159,365 acre-feet. Situated on the Boise River and Snake River OS, Deer Flat Lower plays a crucial role in water resource management in Canyon County, Idaho.

With a hazard potential rated as high and a risk assessment of level 2, Deer Flat Lower poses significant challenges for risk management and emergency preparedness. Despite its age, the dam's condition assessment is not available, indicating a need for further evaluation and maintenance. The Bureau of Reclamation oversees the operations, inspections, and regulatory aspects of Deer Flat Lower, ensuring its continued functionality and safety for both irrigation purposes and flood control in the region.

As a key component of the water infrastructure in the area, Deer Flat Lower serves as a critical resource for agricultural activities and water supply management. Its strategic location and design make it an essential structure for sustaining the local ecosystem and supporting the community's water needs. With ongoing monitoring and maintenance by the Bureau of Reclamation, Deer Flat Lower remains a vital asset in the region's water resource and climate management efforts.