Hacienda Aurelia operated between 1880 and 1915 when owned by Corsican immigrant Domingo Emanuelli Costa (1845-1922) and his wife Aurelia Amy Dominguez, hence the name of the Hacienda.  It was also known as "Haciendita Emanuelli" because it was the smallest sugar factory in Coamo at the time.

The brick smoke stack is 6'x 6' at the base and is 50' tall.  According to a 1978 report by Eng. Luis Pumarada related to the construction of a subdivision near the ruins, the ingenio's masonry building that housed the sugar processing facilities next to the smoke stack was then still standing and reportedly in relatively good shape, except for the roof, of which only the trusses remained.  The report states that at that time, two of the exterior masonry walls with arched openings were relatively well preserved.  Today, only the smoke stack remains.  

The remains of Hacienda Aurelia are located about 750m south of PR-150 km 2.3 in Barrio San Ildefonso on public land at the end of the Calle Marcelino Miranda Sanchez.  Its coordinates are 18.074100, -66.372817.