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“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
San Jose in Santa Clara County, California — The American West (Pacific Coastal)
 

Cornish Pump

 
 
Cornish Pump Marker image. Click for full size.
By Barry Swackhamer, November 17, 2011
1. Cornish Pump Marker
Click on photo to view the illustration of the Cornish Pump.
Inscription. A significant problem in mining is groundwater removal. Water limited the depth of early miners until the Cornish pump was introduced in the 18th Century. Cornish pumps originated in the tin and copper mining region of Cornwall, England, and evolved significantly during the early 1800s.

Cornish pumps were costly and required a unique mineshaft with separate pumping compartment to accommodate piping and a massive reciprocating timber pump rod.

A Cornish pump system consisted of three main components: (1) Plunger pumps placed at intervals in the mineshaft, (2) A pump rod moving up and down to operate the pumps, and (3) A steam engine on the surface to set the pump rod in motion. A Cornish pump raised water in stages. Lift pumps and station pumps received power from the timber rod moving up and down in the shaft’s pumping compartment. Each pump overcame only a small head as it forced water upward to the next storage tank, and so on, until the water reached the surface.
 
Erected 2011 by The California State Society, Daughters of the American Revolution abd New Almaden Quicksilver County Park Association.
 
Marker series. This marker is included in the Daughters of the American Revolution marker series.
 
Location.
Cornish Pump Marker, secont from the right image. Click for full size.
By Barry Swackhamer, November 17, 2011
2. Cornish Pump Marker, secont from the right
37° 10.406′ N, 121° 49.572′ W. Marker is in San Jose, California, in Santa Clara County. Marker can be reached from Almaden Road. Click for map. The Hacienda Mining Display is a short walk on the Deep Gulch Trail from the Almaden Quicksilver County Park parking lot. Marker is at or near this postal address: 21731 Almaden Road, San Jose CA 95120, United States of America.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. Hoeing Table and Cleaning Tank (here, next to this marker); Hacienda Mining Display (here, next to this marker); Mercury Storage Vault (here, next to this marker); Shaker-Concentrator (here, next to this marker); D Retort and Condensing System (a few steps from this marker); Gould Rotary Furnace and Condensing System (a few steps from this marker); Skip Loader (a few steps from this marker); Mine Air Compressors (a few steps from this marker). Click for a list of all markers in San Jose.
 
Categories. Industry & Commerce
 
Cornish Pump Relics image. Click for full size.
By Barry Swackhamer, November 17, 2011
3. Cornish Pump Relics
Cornish Pump Relics image. Click for full size.
By Barry Swackhamer, November 17, 2011
4. Cornish Pump Relics
 
 
Credits. This page originally submitted on , by Barry Swackhamer of San Jose, California. This page has been viewed 496 times since then and 15 times this year. Photos:   1, 2, 3, 4. submitted on , by Barry Swackhamer of San Jose, California. • Syd Whittle was the editor who published this page. This page was last revised on June 16, 2016.
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