Principal spillway definition

Principal spillway means the primary or first used spillway during normal inflow and flood flows.
Principal spillway means the hydraulic structure designed to discharge water stored between the normal pool and the emergency spillway invert elevations.
Principal spillway means the lowest spillway designed to convey water from the reservoir at predetermined release rates.

Examples of Principal spillway in a sentence

  • Principal spillway, emergency spillway and outlet protection for sediment basins shall be designed to pass a 25 year, time of con- centration storm event.

  • Some rose to the occasion, while others were completely out of their element.

  • Principal spillway trench and similar structure foundations—Closer tolerances due to a struc- ture require plus 0.10 foot to minus 0.5 foot.

  • Principal spillway trench—Bottom grade should be close to that specified.

  • Principal spillway-- Also commonly referred to as the service spillway, the [The] primary or initial spillway engaged during a rainfall runoff event that is designed to pass normal flows.

  • We repeat past patterns, and the low moments of history keep echoing again and again.

  • Principal spillway can be either a mechanical spillway (CSP riser and outlet tube) or permanent steel sheet piling weir (preferred based on constructability, maintenance, and safety considerations; weir outlet may require the use of a low-flow orifice to completelydrain the basin).

  • This tailored format is given in Attachment A5.4. Use this suggested outline and tailor it to your particular program.

  • Principal spillway shall be adequate to handle at least the 50-year flood.

  • Principal spillway discharge must be released in a nonerosive manner.


More Definitions of Principal spillway

Principal spillway means the primary structure for the discharge of normal flow through a dam.
Principal spillway means an open and/or closed channel designed to allow a normal range of stormwater flows to discharge from an impoundment.
Principal spillway means an ungated pipe conduit with minimum diameter of twelve inches [30.48 centimeters] constructed for the purpose of conducting water through the embankment back to streambed elevation without erosion.
Principal spillway means the primary or first used spillway during normal inflow and flood flows. "Probable" means likely to occur; reasonably expected; realistic.
Principal spillway means the spillway which conveys normal runoff out of the reservoir.

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