Appendix 5: Comparison of proposed AVA ‘The Burn’ with the ‘Columbia Valley’ AVA The Columbia Valley AVA is a very large (>11,000,000 acre) AVA, covering much of central Washington and extending into several counties in Oregon as well. Currently there are 11 sub regions contained within the Columbia Valley AVA: Ancient Lakes of the Columbia Valley AVA, Columbia Gorge AVA, Horse Heaven Hills AVA, Lake Chelan AVA, Naches Heights AVA, Rattlesnake Hills AVA, Red Mountain AVA, Snipes Mountain AVA, The Rocks AVA, Waluke Slope AVA, and the Walla Walla AVA. The distinguishing features of the Columbia Valley AVA are Climate and Topography (T.D. ATF-190, FR 49:44895-44899). The Climatic factors is the length of growing season, which ranges from 137-204 days, growing degree days (GDD), which range from 1,901-3,320, and precipitation, which ranges for 6-22”/year. The proposed AVA ‘The Burn’ shares these distinguishing features but in much narrower ranges, with GDD ranging from 2405 - 3249 and an overall average of 2763 and precipitation averaging 8.76” with a range that fits in the low end of the Columbia Valley at 6.65 - 10.44”/year. Length of growing season was not calculated. The key Topographic feature for the Columbia Valley AVA is that the elevation is less than 2000 feet. ‘The Burn’ again reflects the much smaller land area with an average elevation of 902 feet and a range from 270 - 1780. Again, this demonstrates the greater uniformity of characteristics within the proposed AVA when compared to the vast Columbia Valley AVA..