“Common Plan of Development” A construction activity is part of a larger common plan of development if it is completed in one or more of the following ways: in separate stages in separate phases in combination with other construction activities It is identified by the documentation that identifies the scope of the project including such things as the following: plats blueprints marketing plans contracts building permits public notice or hearing zoning requests It can include one operator or many operators. Example: A subdivision is being built. You are grading 0.75 acres, another company is clearing 4 different acres, and a contractor is excavating another 0.5 acres. In this case, the total area that would be disturbed is 5.25 acres, so each operator would fall under the requirements associated with disturbing 5 or more acres.