Deadwood is a federal-owned concrete dam located in Garden Valley, Idaho, along the Deadwood River South Fork Payette River. Built in 1931 by the Bureau of Reclamation, this structure primarily serves for hydroelectric power generation, irrigation, and recreation purposes. Standing at 165 feet tall with a 749-foot length, Deadwood has a storage capacity of 191,600 acre-feet and a maximum discharge rate of 11,300 cubic feet per second.

With its high hazard potential and moderate risk assessment rating, Deadwood is regulated, permitted, inspected, and enforced by the Idaho Department of Water Resources. The dam features an uncontrolled spillway with a width of 100 feet and is equipped with valve gates for water release. Despite being in good operational condition, Deadwood underwent modifications in 2004 to strengthen its foundation and seismic resilience, ensuring its continued safety and functionality for water resource and climate enthusiasts to admire and appreciate in the years to come.