This is one of four IND yards, originally dug out to serve as a reservoir for the adjacent Jerome Park. Since this plan was never carried out, it became the only yard constructed in a depressed cut, with respect to neighboring properties. The complex is made up of storage tracks (which serve the BMT/JND lines, as well as the IRT line), service facilities and complementary structures. Although some of the original buildings and equipment have been removed and/or replaced, the Concourse Yard remains as a unique example of industrial architecture and engineering of the early-20th century.

Substations convert high voltage alternating current (AC) to low voltage direct current (DC), used to provide traction power for the trains. In the early 1930s, manually operated substations became obsolete, which impacted the design of the structures that housed them. Most of them were replaced by smaller underground vaults, and those above- ground were constructed in a simple Art Deco style.

This structure features a brick façade with ornamental limestone, and doors embossed with geometric and sunburst patterns. The name of the substation is carved over the main portal, in stylized lettering. It was listed on the National Register in 2006, alongside the Concourse Entry Buildings.