Since the introduction of risk-based spillway standards for Montana high-hazard dams, the Montana Dam Safety Program has searched for methods to provide guidance for professionals to conduct analyses related to spillway adequacy. In 2008, the Dam Safety Program developed Technical Note 1, Analysis of Spillway Capacity in Montana, which is available for use by engineers and professionals, engaged in spillway analyses. Technical Note 2, Loss of Life Determination for Spillway Capacity Analysis, is currently in draft form and should be ready for use by professionals by mid-2010. A draft of Technical Note 3, Simplified Evacuation Mapping for Emergency Action Planning, has been developed and is in the process of being reviewed by the Dam Safety Program.
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