The minimum floodplain of concern for critical actions is the 500-year floodplain. Related Activities . Related activities are those undertakings that are interdependent parts of an action. They either make possible or support an action, or are themselves induced or supported by an action or related activities. Related activities may or may not be Federally permitted or assisted.
Impacts are changes in floodplain or wetland values and functions.
Impacts may occur as either direct or indirect results of an action. Impacts are a direct result of an action whenever the action causes a change in floodplain or wetland values and functions. Impacts are an indirect result of an action whenever an action induces or makes possible related activities which affect the natural values and functions of floodplains or wetlands. Alternatives are those actions, in addition to the proposed action, with similar benefits and which eliminate or minimize impacts on a floodplain or wetland. Minimize means to reduce to the smallest amount or degree practicable.