Lincoln County Process
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The Lincoln County Process is a process used in making Tennessee whiskeys such as Jack Daniel's and George Dickel. The whiskey is filtered through a column of charcoal chips before going into the casks for aging. The process is named for Lincoln County, Tennessee, which was the location of Daniel's distillery at the time of its establishment; subsequent redrawing of county lines means that neither distillery currently using the process is located in its namesake county.
The charcoal used by Jack Daniel's is created on site, from stacks of two by two inch sugar maple timbers called ricks. They are primed with 140 proof Jack Daniel's, and then ignited under massive hoods that help prevent sparks. Once they have reached the char state, the ricks are sprayed with water to prevent complete combustion. The resulting charcoal is then run through a grinder to reduce it to consistent bean-size pellets. These are then packed into 10 foot vats, where they are used to filter impurities from the 140 proof whiskey, after which the whiskey is reduced with water to 125 proof for aging.
The George Dickel distillery uses shallower vats and chills the whiskey before it enters the vats, but the effect is essentially the same.
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