As the Massachusetts Bay Transportation Authority (MBTA) plans to replace its Orange Line fleet with 152 new cars, STV was contracted to perform design and construction support services to expand the 40-year old Wellington Carhouse in Medford, MA.

Project plans included renovating the 120,000-square-foot space and integrating a 12,000-square-foot single-bay addition, as well as introducing new energy-efficient systems. This space features an additional track inspection pit, overhead inspection platform that will increase car service capacity, new cranes, lifts and mechanical equipment, and replacements for all track bay doors and roofing. The electrical system layouts for the double-ended substation will integrate new transformers and a programmable automation controller.  The facility also underwent accessibility enhancements, upgrades to security, fire, mechanical, HVAC, electrical, and plumbing systems, and improvements to its roadway and temporary switchgear.