Kimball, Princeton, and State Substations Rehabilitation

Chicago, Illinois
Chicago Transit Authority
Parsons Transportation Group
Year Completed: 
Upgraded equipment provides power to CTA’s Red Line via the Princeton substation, located on West 63rd Street, and the State substation, located in the Loop neighborhood.  Kimball substation upgrades also provide power to CTA’s Brown Line. The project scope included rehabilitating and upgrading the substation buildings as well. Service was maintained during construction.

Clark, along with design-build partner Parsons Transportation Group, rehabilitated the exterior of the substations by replacing roofs, upgrading masonry, and weatherproofing the exterior. Interior upgrades included the installation of new doors and louvers, flooring, painting, as well as the ventilation and house electrical systems. The project team also managed the abatement of PCB, lead, and asbestos at all three substations.

Clark worked in partnership with Aldridge Electric to rehabilitate electrical and communications systems, replace AC/DC conversion equipment, and add new cables and switches to increase power to key areas. The project increased the electrical power capacity at both the State and Kimball substations by twenty percent. Provisions for supplemental ventilation, heating, and cooling were made throughout the project to ensure the electrical equipment was operational at all times and protected from water and debris infiltration.