Sowinski Sullivan is the architect on a multidisciplinary team that developed the master plan for Amtrak’s Sunnyside Yard to accommodate growth by 2023 and 2030. This effort was followed by the design of buildings in the yard and complete design of the Phase One $450 million high speed rail building. Anticipating rail operation changes over the next two decades, including an expected increase in the amount of train traffic, Amtrak tasked the team with designing three master plan design alternatives to address and meet future yard needs. As the architect, the team specifically focused on the future building needs of both the rolling stock and Amtrak employees. Sowinski Sullivan performed on-site surveys to assess the conditions and layouts of the existing buildings and tracks. The on-site assessment coupled with an analysis of existing and future staffing helped the team develop a complete building program for 2023 and 2030. Broken down by department, the building program provides detailed information regarding the square footage required for administration, welfare, and parking. The sizes of the shop and work spaces were greatly influenced by the number and size of the trainsets that need to be enclosed by a building envelope. Over 1 million square feet of interior space has been planned to accommodate the anticipated growth by 2023 and 2030. After the completion of the masterplan in 2014, Sowinski Sullivan was selected as the architect for the final design and implementation of the phase one high-speed rail (HSR) shop, and to develop preliminary designs for all of the other shop and welfare buildings on the site. These include: a conventional mechanical repair shop; a wheel true/drop table building; commissary and materials management buildings; and an engineering/MOW production building. Also included is phases two & three of the HSR shop.