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Eagle Foothills AVA

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Coordinates: 43°49′56″N 116°24′28″W / 43.83218°N 116.40788°W / 43.83218; -116.40788
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Eagle Foothills
Wine region
TypeAmerican Viticultural Area
Year established2015[1]
CountryUnited States
Part ofIdaho, Snake River Valley AVA
Climate regionRegion Ib[2]
Heat units2418 GDD[2]
Precipitation (annual average)14.8 in (375.9 mm)[2]
Soil conditionsgranite, volcanic material mixed with sandy, coarse and stony loams[1]
Total area49,815 acres (77.836 sq mi)[1]
Size of planted vineyards99 acres (40 ha)[3]
No. of vineyards16[4]
Varietals producedCabernet Sauvignon, Cabernet Franc, Chardonnay, Grenache, Merlot, Mourvèdre, Petit Verdot, Pinot Gris, Sauvignon Blanc, Syrah, Riesling, Roussanne and Viognier[5]
No. of wineries1[4]

Eagle Foothills is the second American Viticultural Area (AVA) in the state of Idaho located in the southwestern region in Gem and Ada Counties. The area lies southeast of Emmett, north of Eagle and approximately 10 miles (16 km) northwest of the city of Boise. It was established on December 28, 2015 by the Alcohol and Tobacco Tax and Trade Bureau (TTB), Treasury as the first sub-appellation in the vast Snake River Valley viticultural area and the first appellation entirely within Idaho’s state borders. It does not overlap with any existing or proposed AVA.[1] Eagle Foothills lies at the north bank of Ancient Lake Idaho with its elevations ranging from 2,490 to 3,412 feet (759–1,040 m).[6] The area encompasses 49,815 acres (78 sq mi) with nearly 70 acres (28 ha) under vine with plans to add 472 acres (191 ha) and seven vineyards.[1] Its USDA plant hardiness zones are 7a and 7b.[7] Vineyard elevations are below 3,000 feet (914 m). The majority of viticulture activity is at 3 Horse Ranch Vineyards with its 46 acres (19 ha) in center of the appellation.[8] The cool climate and relatively short growing season are suitable for growing early to mid-season varietals such as Chardonnay, Pinot Gris and Riesling.[1]

History

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The establishment of the multi-state Snake River Valley appellation in 2007 was a watershed moment for the Idaho viticulture. The petition for the Eagle Foothills viticultural area was submitted by Martha and Gary Cunningham, owner of 3 Horse Ranch Vineyards, on behalf of the local grape growers and vintners.[9] Recognition for Eagle Foothills began in 2012 when the Cunninghams evaluated their area as a special microclimate. With the assistance of climate and viticulture specialists, they quantified their region's climate, soil and terrain noting its unique terroir within the vast Snake River Valley appellation and from other potential Idahoan viticulture areas. The appellation petition was submitted in February 2015 originally proposing an AVA named "Willow Creek Idaho." However, TTB determined that the petition did not sufficiently demonstrate that the region is known by that name. According to TTB regulations, AVA names are required to reflect the area’s history or geology.[10] Therefore, the petitioner submitted a request to change the proposed name to "Eagle Foothills" which was approved.[1][8]

Terroir

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According to the TTB petition, the distinguishing features of Eagle Foothills are its topography, climate, and soils. The area is located within the Unwooded Alkaline Foothills ecoregion of Idaho. This ecoregion is defined as an arid, sparsely populated region of rolling foothills, benches, and alluvial fans underlain by alkaline lake bed deposits. A network of seasonal creeks flowing southwesterly through the region have created deep gulches and a rugged terrain that has a variety of slope aspects favorable to viticulture.[9] The presence of the 4,820 feet (1,470 m) Prospect Peak and surrounding elevations contributes to the terroir with the drainage airflow contributing to its unique climate.[11] Weather patterns present a semiarid nature with rolling hillside and grasslands as the surrounding topography. The elevation within the appellation ranges from approximately 2,490 to 3,412 feet (759–1,040 m) with an 2,900 feet (880 m) average. The high elevations enable cold air to drain and pool within the lower surrounding elevations, resulting in fewer damaging frosts. The hills that provide the best vineyard areas are south-facing slopes with afternoon sunshine coupled with evening shade. The annual precipitation is between 11–18 inches (280–460 mm) with an average of 2,418 growing days.[2] The soils are a diverse mixture of sandy, coarse and stony loams predominantly composed of granite and volcanic materials mixed with sedimentary materials from the ancient lake and the Snake River is notable for their large, irregularly shaped, coarse grains. Due to these irregular shapes, “pockets” of oxygen form in the soil, which promote healthy root growth and allow for rapid water drainage. Despite the desert terrain of the Eagle Foothills, water is abundantly provided by the Snake River aquifer.[2][3]

Unique AVA

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The TTB determined that the Eagle Foothills will remain within the established Snake River Valley appellation. Eagle Foothills is located along the eastern edge of the Snake River Valley and shares the same broad characteristics, in that both regions are semiarid and have vineyards that are planted on slopes to maximize sunlight exposure and minimize the risk of frost. However, Eagle Foothills receives several more inches of precipitation per year and has a slightly longer growing season. Additionally, the Snake River Valley contains a large variety of diverse soils, unlike Eagle Foothills which has fairly uniform soil characteristics. As Martha Cunningham explained in the petition, “The Sunnyslope deserves its own AVA, too. The Snake River Valley is so vast, and certainly diverse enough, I see no reason for others not to follow."[1][12]

Wine Industry

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The Eagle Foothills Grape Growers Association (EFGGA) organization was formed to promote the interests of the local wine grape growing industry focusing on the growing regions in Eagle Foothills. TTB received the petition from Martha Cunningham, owner of the 3 Horse Ranch Vineyards, on behalf of the local grape growers and vintners proposing the establishment of the “Eagle Foothills” in Gem and Ada Counties, Idaho. After careful review of the petition, TTB determined that evidence provided by the petitioner supported the establishment of the Eagle Foothills appellation with expectations that other areas within the expansive Snake River Valley AVA will formulate petitions for their own unique viticulture area.[1][13] The petition stated plans for 4 acres (1.6 ha) to be added to an existing vineyard with additional 7 commercial vineyards covering approximately 472 acres (191 ha) within the next few years. The cool climate and relatively short growing season are suitable for growing early to mid-season varietals such as Chardonnay, Pinot Gris and Riesling. Many Rhône varieties are grown here, but Merlot has achieved critical acclaim.[8]

References

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  1. ^ a b c d e f g h i "Establishment of the Eagle Foothills Viticultural Area" (27 CFR Part 9 [Docket No. TTB–2015–0006; T.D. TTB–131 Ref: Notice No. 150] RIN 1513–AC18 Final Rule). Federal Register. 80 (227). Alcohol and Tobacco Tax and Trade Bureau (TTB), Treasury: 73658–73660. November 25, 2015. Archived (PDF) from the original on February 28, 2024.Public Domain This article incorporates text from this source, which is in the public domain.
  2. ^ a b c d e "Proposed Establishment of the Eagle Foothills Viticultural Area" (27 CFR Part 9 [Docket No. TTB–2015–0006; Notice No. 150] RIN 1513–AC18 Proposed Rule). Federal Register. 80 (71). Alcohol and Tobacco Tax and Trade Bureau (TTB), Treasury: 19908–19914. April 14, 2015.Public Domain This article incorporates text from this source, which is in the public domain.
  3. ^ a b "About: 3 Horse Ranch Vineyards". 3 Horse Ranch Vineyards. Retrieved March 3, 2024.
  4. ^ a b "Welcome to the World, Eagle Foothills AVA!". Wine, Wit, and Wisdom. December 28, 2015. Archived from the original on March 16, 2021.
  5. ^ "Eagle Foothills Wine". Wine Searcher. 2016.
  6. ^ "Yet Another Giant, Ancient Lake". Wickersham's Conscience. June 11, 2017. Archived from the original on November 7, 2021.
  7. ^ "USDA Plant Hardiness Zone Map". United States Department of Agriculture. 2012.
  8. ^ a b c "Eagle Foothills (AVA): Appellation Profile". Appellation America. 2016. Archived from the original on September 24, 2020.
  9. ^ a b Cunningham, Martha (April 15, 2015). "Proposal to Establish the Willow Creek Idaho AVA" (Petition later requested for "Eagle Foothills"). Alcohol and Tobacco Tax and Trade Bureau. 3 Horse Ranch Vineyards.
  10. ^ "§ 9.1 Definitions". Code of Federal Regulations. Alcohol and Tobacco Tax and Trade Bureau (TTB), Department of the Treasury. Retrieved February 17, 2024.
  11. ^ "Prospect Peak (4820)". IDAHO: A Climbing Guide. Retrieved May 9, 2021.
  12. ^ Degerman, Eric (November 25, 2015). "TTB establishes Eagle Foothills AVA for Idaho wine industry". Great Northwest Wine.
  13. ^ "Eagle Foothills AVA... Idaho's 2nd AVA - Snake River Valley's 1st Sub AVA". Wines Northwest. January 18, 2019.
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43°49′56″N 116°24′28″W / 43.83218°N 116.40788°W / 43.83218; -116.40788


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