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The Lincoln County Process is a step used in producing almost all Tennessee whiskeys. The whiskey is filtered through – or steeped in – charcoal chips before going into the casks for aging. The process is named for Lincoln County, Tennessee, which was the location of Jack Daniel's distillery at the time of its establishment, but is no longer used in that county (where the only remaining distillery is Benjamin Prichard's).
Various distilleries use the Lincoln County Process to make Tennessee whiskey. Notable examples include Jack Daniel's Tennessee Whiskey, George Dickel Tennessee Whisky, Uncle Nearest Premium Whiskey, Nelson's First 108 and Tennessee Handmade White Whiskey, Collier and McKeel Tennessee Whiskey, Southern Pride Distillery, and Clayton James Tennessee Whiskey.
For Jack Daniel's, the charcoal used is created onsite from stacks (ricks) of two-by-two-inch sugar maple timbers. The timbers are primed with 140 proof Jack Daniel's and then ignited under large hoods to prevent sparks. Once they reach the char state, the ricks are sprayed with water to prevent complete combustion. The resulting charcoal is then fed through a grinder to produce bean-size pellets that are packed into 10-foot (3.0 m) vats used to filter impurities from the 140 proof whiskey. The whiskey is then reduced with water to 125 proof for aging. The process was taught to Jack Daniel by Nearest Green, the namesake of Uncle Nearest Tennessee Whiskey.
The George Dickel distillery uses deeper (13 foot) vats and distills the whisky – the spelling used by Dickel – to 135 proof. Dickel chills its whisky to 40 degrees F (5 °C) before it enters the vats and allows the liquid to fill the vats instead of trickling it through.
Nelson's Green Brier Distillery uses the Lincoln County Process to make its wheated First 108 Tennessee whiskey and its white whiskey. The original bottling of First 108 was a limited release product in 2017, with a four-year bottling planned for release in 2019.
Some producers claim that according to a 1941 Internal Revenue Service ruling issued at the request of Jack Daniel Distillery, the Lincoln County Process is what distinguishes "Tennessee whiskey" from "bourbon". However, not all producers of products labeled as Tennessee whiskey use the process. (Specifically, it is not used in the production of Benjamin Prichard's Tennessee Whiskey.)
The term "Tennessee whiskey" does not actually have a legal definition in the U.S. Federal regulations that define the Standards of Identity for Distilled Spirits. The only legal definition of Tennessee whiskey in U.S. federally recognized legislation is the North American Free Trade Agreement (NAFTA), which states only that Tennessee whiskey is "a straight Bourbon Whiskey authorized to be produced only in the State of Tennessee". This definition is also recognized in the law of Canada, which states that Tennessee whiskey must be "a straight Bourbon Whiskey produced in the State of Tennessee". None of these regulations requires the use of the Lincoln County filtering process (or any other filtering process).
On May 13, 2013, the governor of Tennessee signed House Bill 1084, requiring maple charcoal filtering to be used for products produced in the state labeling themselves as "Tennessee whiskey" (with a particular exception tailored to exempt Benjamin Prichard's) and including the existing requirements for bourbon. As federal law requires statements of origin on labels to be accurate, the Tennessee law effectively gives a firm definition to Tennessee whiskey.
- Distillery Visit: George Dickel, Alcademics, June 8, 2012.
- "Jack Daniels". Megafactories. Season 4. March 11, 2011.
- "Jack Daniel's Embraces a Hidden Ingredient: Help From a Slave". Retrieved July 14, 2018.
- "The Renaissance Of Nelson's Greenbrier | The Whiskey Reviewer". whiskeyreviewer.com. Retrieved July 14, 2018.
- Collier and McKeel Tennessee Whiskey Archived 2013-03-07 at the Wayback Machine, official web site.
- "Collier and McKeel Tennessee Whiskey - Thirsty South". Thirsty South. November 17, 2011. Retrieved July 14, 2018.
- Mark H. Waymack and James Franklin Harris (1999), The Book of Classic American Whiskeys
- Prichard's Distillery Whiskey Facts Archived 2011-07-15 at the Wayback Machine
- "Standards of Identity for Distilled Spirits, Title 27 Code of Federal Regulations, Pt. 5.22" (PDF). Retrieved October 17, 2008.
- North American Free Trade Agreement Annex 313: Distinctive products
- Canada Food and Drug regulations, C.R.C. C.870, provision B.02.022.1
- Zandona, Eric. "Tennessee Whiskey Gets a Legal Definition". EZdrinking. Retrieved January 11, 2014.
- "Public Chapter No. 341" (PDF). State of Tennessee. Retrieved March 19, 2014.
- Esterl, Mike (March 18, 2014). "Jack Daniels Faces Whiskey Rebellion". The Wall Street Journal. Archived from the original on March 19, 2014. Retrieved March 18, 2014.
- "Enforcement Policy Statement on U.S. Origin Claims". Federal Trade Commission. April 24, 2014. Retrieved July 15, 2018.
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