2003 Mining History Association Field Trip

 

Cresson Mine

Cripple Creek, Colorado

June 6, 2003

Tour Hosts: Cripple Creek and Victor Gold Mining Company

 

PHOTO GALLERY 1 of 2

 

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View of the Cresson Mine open pit and leaching areas from the American Eagles Mine Overlook.  With the higher-grade ore exhausted by underground mining, the modern miners turned to open pit mining to recover lower grade ore.

A blast hole drilling rig in the Cresson Pit.  When a pattern of holes is complete, the holes are filled with explosives to break the rock.

A front-end loader fills a haulage truck in the open pit.  The ore is then hauled to the crusher.

The crushing plant reduces the size of the ore before it is placed in the leaching areas.

A valley fill leaching area in which cyanide solutions dissolve the gold from the ore.  The gold bearing solutions are collected at the bottom of the fill area and piped to the gold recovery plant.

Heap leaching dumps are also used at the Cresson Mine.  The gold recovery plant is seen in the background.

(Top) MHAers touring the gold recovery plant where the gold is first adsorbed onto carbon particles.  The gold is then electrolytically removed from the carbon forming a sludge.  The sludge is filtered to remove moisture and refined in a furnace to produce a mixture of metallic gold and silver called dore.  A further refining step separates silver from the pure gold.

 

(Right)  Another view of the carbon adsorption process in the gold recovery plant.

 

Photo Credits: Johnny Johnsson

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