The eight generating units of the Fort Randall Dam are capable of generating 40 megawatts of electricity each, with an annual production of 1.727 billion kilowatt hours. The combined maximum capacity of 320 megawatts is enough to supply 245,000 households, according to the Corps of Engineers. The river behind the dam drains an area of 263,480 mi² (682,410 km²). Its reservoir, Lake Francis Case, has a surface area of 102,000 acres (41,000 ha) at maximum operating pool, coinciding with a volume of 5,700,000 acre feet (7.0×109 m3).
In June 2011, in response to the 2011 Missouri River Floods, the dam was releasing over 143,000 cubic feet per second (4,000 m3/s), which greatly exceeded its previous record release of 67,000 cu ft/s (1,900 m3/s) set in 1997.