Arizona Administrative Code
Title 12 - NATURAL RESOURCES
Chapter 15 - DEPARTMENT OF WATER RESOURCES
Article 12 - DAM SAFETY PROCEDURES
Section R12-15-1220 - Existing Dams

Universal Citation: AZ Admin Code R 12-15-1220

Current through Register Vol. 30, No. 38, September 20, 2024

A. The requirements of this Article apply to existing dams, except as provided in subsections (B) and (C).

B. If the Director has determined that an existing dam is in a safe condition, the owner is not required to comply with R12-15-1216 unless the Director determines that it is cost effective to upgrade the dam to comply with the requirements of R12-15-1216 at the time a major alteration or major repair is planned. In determining whether it is cost effective to upgrade a dam, the Director shall consider:

1. The hazard potential classification of the dam;

2. Whether the cost of the upgrade would exceed 25% of the total cost of the major alteration or major repair; and

3. Whether there is a more cost effective alternative that would provide an equivalent increase in safety.

C. If the Director has determined that a dam is in an unsafe condition, the owner shall comply with the requirements in R12-15-1216. The owner is not required to comply with a requirement in this Article if the Director finds that, considering the site characteristics and the proposed design, the requirement is unduly burdensome or expensive and is not necessary to protect human life or property. The Director shall consider the size, hazard potential classification, physical site conditions, and applicability of a requirement to the dam. The Director shall state in writing the reason or reasons the owner is not required to comply with a requirement.

D. The owner shall ensure that installation of utilities beneath or through an existing dam is accomplished by open cuts or jacking and boring methods.

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