The Alcohol and Tobacco Tax and Trade Bureau (TTB) establishes the approximately 4,000-acre "Crystal Springs of Napa Valley" American viticultural area (AVA) in Napa County, California. The newly- established AVA is located entirely within the existing North Coast and Napa Valley viticultural areas. TTB also is modifying the existing Calistoga AVA in response to comments received during the comment period. TTB designates viticultural areas to allow vintners to better describe the origin of their wines and to allow consumers to better identify wines they may purchase.