The purpose of the Planned Unit Development Overlay District (PUD) is to achieve land development that is responsive to the natural and environmental assets and liabilities of a given site. The PUD provides an alternative overlay zoning category that is intended to encourage imaginative design of development. The PUD shall be a well-integrated development in terms of major design elements such as roads, drainage systems, utilities, and open space. The PUD allows greater design flexibility so that natural features may be protected and development concentrated in an innovative and efficient manner.