For this new Metrolinx infrastructure project RDHA were commissioned to design the structure and enclosure for a new generator building that services Union Station in downtown Toronto. The project is located immediately adjacent to the historic Scott Street interlocking signal tower, and replaces an existing generator that has come to the end of its life and will be de-commissioned. The new addition attempts to respect this historic building and bring a similar level of design attention to what are often overlooked but highly essentially pieces of hidden engineering and infrastructure in the city.