Researched during the summer of 2006 in a collaborative effort between Carnegie Mellon University's Urban Lab and East Liberty Development, Inc. this thesis seeks to develop a model for evaluating the impact of progressive urban design strategies in an existing community by measuring the costs and potential returns of public investment in progressive urban infrastructure. Using the case study of East Liberty as a laboratory, this study identifies clear baseline assumptions for the costs of urban infrastructure, as well as estimated public returns based on private investment leveraged and new residential and commercial tax revenue streams. Aimed at providing urban designers a facilitation tool in arguing for public investment in progressive urban infrastructure that reconnects fragmented com m unities, this study suggests that clear financial and com m unity returns are "hidden" in urban infrastructure investment.