Hacienda Coto was located in Barrio Sabana Grande Abajo of San Germán, approximately 1.3 miles west of the town of San Germán, about 400m north of PR-114.  It was established in 1810 as a sixty acre plantation with an oxen driven and wooden masses mill by retired military Captain Ramón de Quiñones Quiñones (1774-1850) and his wife Francisca Martina Silva Lopez de Victoria ( -1864), who were one of he first sugarcane planters in the area.  Originally, Hacienda Coto produced molasses for sale in the local market.  By 1835 additional land had been acquired and by 1852 it was a four hundred fifty acre plantation and one of the largest in the area with its own open and vaulted canal system for irrigation.   

Ramón and Francisca had eight children some of whom married with cousins as was customary at the time in order to retain wealth within the family.  The Quiñones Silva and Quiñones Quiñones family were not only related but they were neighbors.  Hacienda Coto of the Quiñones Silva family was adjacent to hacienda Filial Amor of the Quiñones Quiñones family.  Ramón and Francisca children were:

1. Vicente Maria Quiñones Silva ( -1883) who married Amalia Quiñones Ramirez de Arellano (1815-1889)

2. Celso Macario Quiñones Silva (1828-1901) who married Carmen Carrero Gutierrez

3. Eleuterio Quiñones Silva (1831-1914) who married Ursula Cardona

4. Filomena Quiñones Silva (1832-1921) who married José Maria Quiñones Quiñones owner of Hacienda Santa Rita

5. Eulalia Quiñones Silva (1837-1888) who was married to  José Nestor de Cardona Ramirez de Arellano (1833-1905)

6. Inocencia Quiñones Silva ( ) who married José Marcial Quiñones Quiñones (1826-1893)

7. Cándida Quiñones Silva (1839-1918) who married José Marcial Quiñones (1826-1893) after the death of her sister

8. Rudesindo  Quiñones Silva

When Ramón de Quiñones Quiñones died in 1850, the administration of the hacienda relied on his widow Francisca and their four male sons; Vicente, Celso Macario, Eleuterio and Rudesindo.  During the four sons administration, in 1852 a steam mill was installed which substantially improved the volume and quality of the sugar produced.  Upon Francisca's death in 1864, her estate consisted of several properties which included Hacienda La Concepcion in Barrio Espinal of Aguada and Hacienda Coto.  Hacienda La Concepción was purchased from the estate by their daughter Eulalia and Hacienda Coto was split between their four sons with Vicente Maria inheriting one hundred forty four 144, half of the canal system and the sugar factory.  When Vicente Maria died, the hacienda passed on to his widow Amalia, then to their son Ramón Quiñones Quiñones (1857- ) and then to his widow Isabel Salazar de Gurendes y Lantarón (1861- ).  The fourth generation owner of the hacienda was Ramón and Isabel's son Ernesto Quiñones Salazar (1879-1942) and his wife Josefina Sambolín Becchi.  The fifth generation and last family member to own and operate the hacienda was Ernesto Quiñones Sambolin (1911-1993).

Its ruins include the owner's two story house, chimney and walls of the building that housed the steam mill, constructed in 1852 during the administration of Francisca Silva López de Victoria, the widow of its original owner Ramón de Quiñones y Quiñones.  This hacienda was documented in a 1977 American Historic Engineering Record (HAER Report) which contains drawing and pictures by Jack Boucher and Fred Guessing.