Overflow structure of a dam Water passed over a spillway, or spill, can be forced, when there is not enough storage capability and flows exceed turbine capacity, or planned, when water is spilled to enhance juvenile fish passage
the channel or passageway around or over a dam through which excess water is diverted
a depression in the embankment of a pond or basin, used to pass peak discharges in excess of the design storm
A passage such as a paved apron or channel for surplus water over or around a dam or similar obstruction An open or closed channel, or both, used to convey excess water from a reservoir It may contain gates, either manually or automatically controlled, to regulate the discharge of excess water
The channel or passageway around or over a dam through which excess water is released without going through the turbines It is a safety valve for a dam and must be capable of discharging major floods without damaging the dam while maintaining the reservoir level below some predetermined maximum level
A constructed passage for surplus water to run over or around a dam A 2-D basic feature
A structure over or through which excess or flood flows are discharged If the flow is controlled by gates, it is a controlled spillway, if the elevation of the spillway crest is the only control, it is an uncontrolled spillway
a waterway of a dam or other hydraulic structure used to discharge excess water to avoid overtopping of a dam
A sluiceway or passage for superfluous water in a reservoir, to prevent too great pressure on the dam