Laserfiche WebLink
<br />HAZARD. A situation which creates the potential for adverse consequences such <br />as loss of life, property damage, and adverse social and environmental <br />impacts. Impacts may be for a defined area downstream of a dam from flood- <br />waters released through spillways and outlet works of the dam or waters <br />released by partial or complete failure of the dam. They may also be for an <br />area upstream of the dam from effects of backwater flooding or effects of <br />landslides around the reservoir perimeter. <br /> <br />HYDROGRAPH. A graphical representation of the stage or discharge as a <br />function of time at a particular point on a watercourse. <br /> <br />INFLOW DESIGN FLOOD. The flood hydrograph used in the design of a dam and its <br />appurtenant works particularly for sizing the spillway and outlet works and <br />for determining maximum temporary storage and height of dam requirements. <br /> <br />MAINTENANCE. Maintaining structures and equipment in intended operating <br />condition, equipment repair, and minor structure repair. <br /> <br />NOTIFICATION. To inform appropriate individuals about an emergency condition <br />so they can take appropriate action. <br /> <br />RESERVOIR. An artificial lake, basin, or tank in which water can be stored. <br /> <br />SPILLWAY. A waterway used to convey water from a reservoir which may be <br />either gated or ungated. Definition of specific types of spillways follows: <br /> <br />SERVICE SPILLWAY. <br />frequent regulated or <br />significant damage to <br /> <br />A spillway that is designed to provide continuous or <br />unregulated releases from a reservoir without <br />either the dam or its appurtenant structures. <br /> <br />AUXILIARY SPILLWAY. Any secondary spillway which is designed to be <br />operated very infrequently and possibly in anticipation of some degree of <br />structural damage or erosion to the spillway during operation. <br /> <br />EMERGENCY SPILLWAY. A spillway that is designed to provide additional <br />protection against overtopping of dams and is intended for use under extreme <br />conditions such as misoperation or malfunction of the service spillway or <br />other emergency conditions. <br /> <br />18 <br />