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historicalmarkerproject/markers/HM25SQ_military-community_San-Jose-CA.html
Recreation at Home
Remains of a swimming pool are a visual reminder of a thriving community of military families that lived at the Almaden Air Force Station between 1957 and 1980. Hundreds of people live in military housing near this loca…
historicalmarkerproject/markers/HM25SP_the-bell-tower_San-Jose-CA.html
In 1874, a fire swept through the New Almaden community destroying many miner's homes. To prevent the recurrence of such a disaster, mine manager James Randol organized a local bucket brigade and ordered the construction of a bell tower and a syst…
historicalmarkerproject/markers/HM25RX_miners-and-settlers_San-Jose-CA.html
Red Rock Riches
Cinnabar was highly valued as used for pigment by the Ohlone people who lived around Mount Umunhum. It contained mercury, also known as "quicksilver," which was essential for processing gold during California's Gold Rush.…
historicalmarkerproject/markers/HM186H_incline-tramway_San-Jose-CA.html
In 1864 Sherman Day and C.E. Hawley built a rail line to carry ore from the mines on Mine Hill to the lower town furnaces.
Transportation of ore to the furnaces was slow and expensive by horse and wagon, and production and demand had increased …
historicalmarkerproject/markers/HM140Z_the-buena-vista_San-Jose-CA.html
The Buena Vista shaft commenced on July 5, 1882. It became the deepest sunk into the Quicksilver Mining Company's lands, eventually reaching a depth of 2,300 feet, 600 below sea level.
Though not itself a significant source of ore, the Buena Vi…
historicalmarkerproject/markers/HMZOQ_mancha-little-trammer-battery-locomotive_San-Jose-CA.html
The Mancha "Little Tramper" is one of the smallest mining locomotives manufactured by the Mancha Storage Battery Locomotive Company. It is powered by batteries, allowing it to be used deep within the mines without emitting toxic fumes. Although sm…
historicalmarkerproject/markers/HMZOP_mine-ventilation-fans_San-Jose-CA.html
Ventilation fans provided fresh air for miners deep within the mines. Ventilation pipe connected to fans carried air wherever it was needed in the mine to provide miners with breathable air by diluting and displacing dust and noxious gases. Fans w…
historicalmarkerproject/markers/HMZOO_mine-air-compressors_San-Jose-CA.html
These two air compressors are typical of those used in hard-rock mining. The Gardner-Denver air compressor, powered by a gasoline engine, is a mobile type that was moved to wherever it was needed. The Ingersoll-Rand air compressor, powered by an e…
historicalmarkerproject/markers/HMZON_skip-loader_San-Jose-CA.html
The skip loader was used to carry cinnabar ore to the surface from deep in the mines. A motor-driven hoist pulled the skip loader up tracks until it reached the surface, where two sets of tracks, one inside pair and one outside pair, were reached.…
historicalmarkerproject/markers/HMZOL_gould-rotary-furnace-and-condensing-system_San-Jose-CA.html
The rotary furnace was used to recover mercury from cinnabar ore. Finely crushed ore fro the fine ore bin entered the furnace by means of a feeder known as a shotgun or bump feeder. The feeder periodically injected a measured amount of ore into th…