This paper provides details of the South Capitol Street project, a case study in urban sustainability. The planning and design process for the project was geared to achieving sustainable infrastructure and involved regular meetings of concerned agencies, selection of multidisciplinary consultant teams, regular briefings of politicians at the municipal and federal levels, and comprehensive public engagement. Major thesis of the paper, demonstrated in the case study, is that early collaboration between planners, designers, and engineers, with a mix of disciplines, and steady coordination with political interests, is crucial to urban sustainability. Washington DC, although the capitol of the United States, has been long divided by out-dated infrastructure planned and built at a time when the explicit goal was to clear out blight. Little thought was given to neighborhoods marginalized in the wake of such building. In the new millennium the southeast and southwest quadrants of the city are poised to be redeveloped as thriving urban nodes, and are among the last few places where major redevelopment can occur. However, the existing transportation infrastructure is deteriorated, performs poorly, fails to provide logical connections, and fences off prime developable parcels. In addition, this infrastructure is a barrier to access to the city's unique environmental asset, the Anacostia River. As one of the top ten polluted waters in the United States, it must daily absorb untreated urban pollution and runoff from roads and development in its watershed. It is in need of immediate attention. The Anacostia Waterfront Initiative (AWI) is a unique partnership of federal and local agencies and is a significant revitalization effort for Washington DC. The AWI Framework Plan laid out specific ways that the corridor could be revitalized, including sustainable infrastructure. Improving the health of the river, rebuilding the landscape, and creating vibrant, sustainable communities will contribute to economic development and environmental quality that will be enjoyed by all of the city's residents. South Capitol Street project is underway and part of the AWI. The award-winning South Capitol Street project was planned, designed and will be constructed using several sustainability principles. As a piece of sustainable transportation infrastructure it will address the new context for the corridor while meeting the triple bottom line. Among other innovations, the facilities are designed to treat stormwater runoff onsite and low-impact design features are integrated into the streetscape (environmental). The District Department of Transportation has developed new standards and specifications for the AWI area that include permeable pavers, planting zones, solar-powered lights, and maintenance practices that improve environmental quality. The timing of the infrastructure improvements is carefully coordinated with developers to ensure minimum disruption to the completed facilities by future development and to maximize service to new development (financial). In addition to environmental benefits to the community, project includes training and outreach centers in the project neighborhood (community).