The Navy Yard (TNY), located at the confluence of the Delaware and Schuylkill Rivers in Philadelphia, operated as a US Naval base for nearly 150 years, until its operations ceased in 1996. After sitting idle for four years, the PIDC, on behalf of the City, acquired control of the property for purposes of economic revitalization. PIDC subsequently led the charge to engage partners and develop a Navy Yard Master Plan in 2004, with updates in 2013 and 2022. Community engagement was vital to Plan development and played a key role in determining the vision, values, and design priorities. Although the original focus on creating an office, industrial/manufacturing, and research/development complex in a campus setting was very successful, the 2022 Navy Yard Master Plan shows the site evolving into a mixed-use, mixed-income sustainable community. Today, TNY boasts 150 employers, preservation of the Historic Core through adaptive reuse, 20 acres of parks, a mile of waterfront trail, a two-route shuttle system, complete streets, designation as a certified Level-1 arboretum, and many events ranging from music, art, and food festivals to health and wellness programming. Integration of residential development is coming soon. Through dedication to planning, public involvement, successful public-private partnerships, and a growing focus on sustainability and innovation, TNY is an excellent example of a “great” transformation that has resulted in creating a vibrant and thriving Philadelphia neighborhood.