The finding was confirmed by sources from the city council's Works and Equipment department, following an alert from the archaeological control team overseeing the project. This team promptly notified the General Directorate of Cultural Heritage of the Community of Madrid about the discovery.

Currently, the City Council awaits instructions from the regional body. In the meantime, the renovation work at Puerta de Alcalá continues, but the discovered remains will stay in their original location until the Community provides guidance on how to proceed.

Madrid's electrified tram network began operating in 1898 and ceased definitively in the summer of 1972. For decades, various lines of this public transport system ran through the Alcalá area, connecting the city center with neighborhoods such as Arturo Soria and Plaza de Castilla.