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The New Almaden Quicksilver Mining Museum is located in the Casa Grande (big house) in New Almaden. La Casa Grande, an 1854 revival-style mansion designed and built by architect Francis Myers, was the official residence and office of the mine superintendents, as well as a country retreat for wealthy mine investors.
It was located at the south end of Almaden Valley, near the Santa Teresa Hills. The grant included a large section of the rocky hills upon which a rich source of mercury-carrying cinnabar ore was found in 1844–1845. The discovery was made public and the New Almaden quicksilver mine (mercury mine) began producing a small amount of rich ore in ...
The New Almaden mine was taken in possession by Robert Walkinshaw of the New Almaden Mining Company in April 1847 by means of a forged grant document supposedly bearing the signature of the alcalde of Presidio San José, José Dolores Pacheco, who always signed documents "Dolores Pacheco"—the questionable document was signed only "Pacheco ...
Due to the toxicity of mercury and its byproducts to humans, the mine has variously employed penal labour, slave labour, and prisoners of war over its long history. Almadén mine stopped working in 2002, due to the European mercury mining prohibition. In 2006, the mine opened to the public who can visit the first level, 50 metres (160 ft ...
The New Almaden mine opened in 1824, ultimately extending 2,450 feet (750 m) below ground. By 1861 it already extended 250 feet (76 m) below ground and produced 970 flasks of mercury a month. In the late 20th century, enough gold was found in association with mercury, arsenic, tungsten and thallium to open the McLaughlin mine in the Mayacmas ...
At the heart of the Almadén site is a Mining Park, where the public can go underground. [2] There are also buildings relating to the town's mining history, including Retamar Castle, [3] the San Rafael Mining Hospital (now an archive), and eighteenth-century dwellings which form a hexagonal bullring. [4]
Butterworth was president of the Quicksilver Mining Company (QSMC) of New York, which sought the New Almaden Mine near San Jose, California. [1] In August 1863, Butterworth resigned his position as QSMC President and moved to California to become general manager of the company's newly acquired the New Almaden mine, receiving an annual salary of US$25,000 (equivalent to $618,649 in 2023).
1846 - John Fremont kills original owner of the largest North American mercury mine at New Almaden [8] after failing to buy it; 1846 - Yerba Buena land grant takes its name from local Catholic mission and becomes San Francisco [9] 1848 - Treaty of Guadalupe Hidalgo promises Mexican-Americans ownership of their Ranchos (ranches) and water rights