Cornish Pump

Cornish Pump (HMXNJ)

Location: San Jose, CA 95120 Santa Clara County
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Country: United States of America
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N 37° 10.406', W 121° 49.572'

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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.
Series This marker is part of the Daughters of the American Revolution series
Year Placed2011
Placed ByThe California State Society, Daughters of the American Revolution abd New Almaden Quicksilver County Park Association
Marker ConditionNo reports yet
Date Added Tuesday, September 30th, 2014 at 8:23pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)10S E 604204 N 4114757
Decimal Degrees37.17343333, -121.82620000
Degrees and Decimal MinutesN 37° 10.406', W 121° 49.572'
Degrees, Minutes and Seconds37° 10' 24.36" N, 121° 49' 34.32" W
Driving DirectionsGoogle Maps
Area Code(s)408
Closest Postal AddressAt or near 101-149 Deep Gulch Trail, San Jose CA 95120, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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