Today, more than 32,000 acres are contained within the Preserve, and no land has ever been removed. In the words of the ordinance: “This district classification is intended to be applied in the fertile valley and foothill areas of Napa County from Napa to Calistoga in which agriculture is and should continue to be the predominant land use, where uses incompatible to agriculture should be precluded and where development of urban type uses would be detrimental to the continuance of agriculture and the maintenance of open spaces which are economic and aesthetic attributes and assets of the County of Napa.