The purposes of the SPD Special Planning District are as follows:
(a) to regulate the development and use of property in areas throughout the City that contain sensitive or unique environmental, historic, architectural, or other features which require additional protections and flexibility not provided through the application of the Zoning Code;
(b) to promote creative and sensitive site planning;
(c) to provide for a greater range or mixture of compatible uses than would be allowable in the standard zoning districts of this Code, while also requiring features that protect against negative impacts of incompatible land uses or harm to the environment;
(d) to provide an effective method for the City to guide the development of such areas so as to preserve unique characteristics or to provide for the greater range or mixture of land uses when appropriate; and
(e) to create a regulatory structure which will allow more flexible and creative design of the built environment, within the limits of the approved conceptual development plan, than is possible with the lot-by-lot design approach of a conventional zoning district.