Current law, GS 143-215.31(a1), requires the owner of a dam classified by the Department of Environmental Quality (Department) as a high-hazard dam or an intermediate-hazard dam to develop an Emergency Action Plan for the dam and sets out four specifications an Emergency Action Plan must minimally include. This act amends the fourth specification, which requires an Emergency Action Plan to contain a downstream inundation map depicting areas affected by a dam failure and sudden release of the impoundment. Requires a professional engineer (previously, licensed professional engineer) or person under the reasonable charge of a professional engineer to prepare the downstream inundation map if (1) the dam is associated with a coal combustion residuals surface impoundment as defined by GS 130A-309.201, or (2) the Department determines that it is necessary to protect public health, safety, and welfare, the environment, or natural resources (previously, only required licensed professional engineer if the dam is associated with a coal combustion residuals surface impoundment).