Vilar Dam is a bottom outlet, it was completed in 1965, has a maximum discharge of 500 m/s and its total volume is 300,000 m.
There is also a bottom outlet. A gatehouse, gate house, outlet works or valve house for a dam is a structure housing sluice gates, valves, or pumps (in which case it is more accurately called a pumping station). Rockfill embankment dam 
