Section 025. Hazard Classification

01. Hazard Classification. The following table describes categories of hazard used by the Departmen t to classify dams relative to the potential failure consequences estimated for downstream locations. The listed hazard classifications are meant to serve as guidelines for implementing design, construction, and operation criteria, subjec t to final interpretation by the Director: Estimated Hazard Classification Downstream Development Economic Losses Loss of Life Low economic losses generally lim- Undeveloped property, no ited to the owner; low damage to or permanent or permanently Low No loss of life disruption of transportation, utilities, occupied structures for human or other public facilities or values habitation. including environmental loss. Estimated Hazard Classification Downstream Development Economic Losses Loss of Life No concentrated urban devel- Moderate damage to agricultural, opment, 1 or more permanent commercial, or industrial facilities; structures for human habita- Loss of life is moderate damage to or the disrup- Significant tion within the flood zone that unlikely to tion of transportation, utilities, or are potentially inundated with occur other public facilities or values includ- flood water at a depth of less ing environmental loss. than two (2) feet. Urban development, or any Severe damage to agricultural, com- structure for permanent or mercial, or industrial facilities; dam- temporary human habitation High probabil- age to or the prolonged disruption of High which are potentially inun- ity for loss of transportation, utilities, or other pub- dated with flood water at a life lic facilities or values including envi- depth of two (2) feet or ronmental loss. greater. (3-30-23) 02. Determination of Hazard Classification. The Director shall determine the hazard classification of a new or existing dam governed by these rules

the prolonged disruption of High which are potentially inun- ity for loss of transportation, utilities, or other pub- dated with flood water at a life lic facilities or values including envi- depth of two (2) feet or ronmental loss. greater. (3-30-23) 02. Determination of Hazard Classification. The Director shall determine the hazard classification of a new or existing dam governed by these rules. Hazard classifications shall be assigned to new and existing dam s based on the severity of failure consequences exclusive of the size or the physical condition of the dam. Th e designated hazard classification, as established by the Director, shall determine the applicable design and operationa l standards applied to the dam. (3-30-23) 026. – 029. (RESERVED)