Current through Register Vol. XLI, No. 50, December 13, 2024
Section 38-14-2 - DefinitionsUnless the context in which used clearly requires a different meaning, the definitions contained in W.Va. Code § 20-50-3 shall apply to this rule in addition to those definitions set forth below.
2.1 "Appurtenances" means any ancillary part of the dam and/or reservoir system which contributes to the operation or construction of the dam.2.2 "Channel protection" means any measures taken to prevent or control erosion, cavitation, or other destructive the lowest point of the crest of the embankment of a dam and the reservoir water surface.2.3 "Dangerous condition" means any structural, or hydraulic condition of a dam or its appurtenances which may lead to (1) failure of the dam and possible loss of human life or substantial loss of property, or (2) harm to the public health or welfare, or (3) significant harm to the environment.2.4 "Design storm" means predicted precipitation of given intensity, frequency, and duration based on National Weather Service data,2.5 "Diversion ditch" means a designed channel constructed for the purpose of collecting and transmitting surface runoff resulting from a given design storm.2.6 "Embankment" means a man-made deposit of earth or waste materials, usually exhibiting at least one sloping face.2.7 "Emergency spillway" means a hydraulic structure designed to discharge water in excess of that which an impoundment is designed to store or which cannot be passed through a principal spillway.2.8 "Engineer" means a registered professional engineer in accordance with Article 13, Chapter 30 of the Code of West Virginia, 1931, as amended (W.Va. State Registration Law for Professional Engineers.)2.9 "Freeboard" means the vertical distance between the lowest point of the crest of the embankment of a dam and the reservoir water surface.2.10 "Geotechnical engineering" means the application of soil mechanics, rock mechanics, and geology to the solution of problems involving engineering structures and their interaction with surrounding earth materials.2.11 "Hazard potential" means a classification rating assigned to a structure based on engineering evaluations and judgement for predicting the danger to human life, property and environment should a failure of the structure occur.2.12 "Highway, primary" means those roadways which are designated as interstates, U.S. numbered highways or West Virginia numbered highways.2.13 "Highway, secondary" means those roadways which are designated by the West Virginia Department of Highways as county numbered routes.2.14 "Hydraulics" means the study of the physical behavior of liquids, especially water, in natural or man-made systems or -processes.2.15 "Hydrologic analysis" means a determination, using accepted engineering methods, to establish surface water runoff for a specified design storm.2.16 "Hydrology" means the science that deals with the occurrence and behavior of water in the atmosphere, on the ground and underground.2.17 "Impoundment" means a basin constructed for the retention of water, sediment or waste.2.18 "Natural drainway" means any natural water course which may carry water to the tributaries and rivers of the watershed.2.19 "P100" means the rainfall amount based on a 100 year" frequency, 6-hour, duration rainfall event.2.20 "PMP" means the probable maximum precipitation.2.21 "Principal spillway" means the hydraulic structure designed to discharge water stored between normal pool and the emergency spillway invert elevations.2.21 "Probable maximum precipitation" means the depth-duration-area rainfall for a particular area that represents the maximizing of the most critical meteorological conditions that are considered possible of occurrence.2.22 "Safety factor" means the ratio of the available shear strength to the developed shear stress, or ratio of the sum of the resisting forces to the sum of the loading or driving forces, as determined by accepted engineering practices.2.23 "Sediment" means solid material, either mineral or organic, resulting from the works of man that has been moved from its site of origin by water.2.24 "Serious problem" means a situation, which left uncorrected, may lead to a dangerous condition,2.25 "Site" means the actual or planned location of a dam including, but not limited to, appurtenant works, reservoirs area, diversion ditches, sediment control facilities, and borrow areas.2.26 "Subsidence" means a sinking, collapsing or cracking of a portion of the earth's surface resulting from the presence of a void or voids beneath the surface.