BUILDING STRONG ® US ARMY CORPS OF ENGINEERS | Jacksonville District Portugués Dam Hydraulic / Hydrologic Hydraulic / Hydrologic  Normal River Flows Low (less than 50 cfs)  10.5 Square Mile Basin  Outlet Works include Intake Structure with Emergency Sluice/Roller Gates, Two 60-inch Diameter RO's, Emergency and Service Valves in Valve House, Emergency Spillway.
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