Established 1972. Estate. Clos Du Val's estate vineyards are located on some of the finest winegrowing land in Napa Valley. Acquired in 1973, our estate Carneros vineyard provides ideal conditions that have established the region's reputation for bright and vibrant Chardonnays. closduval.com. 13.5% alc by vol. Produced and bottled by Clos Du Val Wine Co., Ltd Napa, California USA.