Lewis-Clark Valley would add AVAs to Idaho, Washington

By on April 21, 2015
Rock 'n' J Vineyard would be in the Lewis-Clark Valley AVA.

Rock ‘N’ J Vineyard south of Asotin, Wash., is above the Grande Ronde River. It is the easternmost vineyard in Washington and would be in the Lewis-Clark Valley American Viticultural Area. (Photo by Andy Perdue/Great Northwest Wine)

LEWISTON, Idaho – By the end of this year, Idaho could have its second American Viticultural Area – and Washington could have its 14th.

The Lewis-Clark Valley was introduced by the federal government last week to begin a 60-day commenting period.

“We are growing a lot of grapes and producing a majority of our wines from grapes grown in the valley,” said Coco Umiker, who owns Clearwater Canyon Cellars in Lewiston with her husband, Karl. “Now we want to put an AVA on these wines.”

The Umikers began working with the owners of Colter’s Creek Vineyard & Winery in 2009 to start the process of establishing the Lewis-Clark Valley AVA.

The proposal is not without some controversy, as it would actually shrink the Columbia Valley by about 57,000 acres.

The AVA proposal was researched and written by Alan Busacca, a well-known and highly regarded geologist who wrote the successful petitions for the Wahluke Slope and Lake Chelan AVAs in Washington. He’s also been heavily involved in researching soils and vineyard site suitability in the Walla Walla Valley, the Horse Heaven Hills and Red Mountain.

Busacca, a retired Washington State University professor, served for a year as director of Walla Walla Community College’s vaunted viticulture and enology program before his position was eliminated as a result of budget cuts. He also co-owns Volcano Ridge Vineyard near The Dalles, Ore.

If approved, the Lewis-Clark Valley could go into effect as early as late this year.

History of Lewis-Clark Valley wine

The Wine Project was written by Ron Irvine with Walter Clore. It was published in 1997.

“The Wine Project” is a 1997 book written by Ron Irvine with Walter Clore. It chronicles the history of the Washington state wine industry and also includes a chapter on the viticultural history of Lewiston, Idaho.

The region in and around the cities of Lewiston, Idaho, and Clarkston, Wash., has a rich viticultural history that can be traced back to 1872, only a decade after the two cities were established.

In fact, the Lewis-Clark Valley had a thriving wine and grape industry until the dark curtain of Prohibition surrounded the nation and brought down the industry for decades.

In 1872, Frenchman Louis Delsol planted the first known grapes in the Lewis-Clark Valley and started his winery in the late 1870s in Lewiston. By 1900, he had 80 acres in the ground.

According to The Wine Project, a book by Ron Irvine that chronicles the history of the Washington wine industry, another Frenchman, Robert Schleicher, also began planting wine grapes and making wine in the Lewis-Clark Valley and reportedly had quite an operation going in the early 1900s. According to Irvine’s book, he was growing 50 grape varieties, both vinifera and hybrid.

In 1972, meteorologist Bob Wing began planting wine grapes in the valley as part of an research project with the University of Idaho. He planted 19 varieties that first year, then the funding ran out.

Undeterred, Wing sent his data to Walter Clore at the WSU research station in Prosser, Wash. Clore, hailed as “the father of Washington wine,” showed great interest and ultimately included Wing’s research in The Wine Project, which Clore was conducting in Washington.

About the proposed Lewis-Clark Valley AVA

Coco and Karl Umicker own Clearwater Canyon Cellars in the proposed Lewis-Clark Valley AVA.

Coco and Karl Umiker, owners of Clearwater Canyon Cellars in Lewiston, Idaho, walk through their estate vineyard. They are in support of the Lewis-Clark Valley AVA. (Photo by Andy Perdue/Great Northwest Wine)

As proposed, the Lewis-Clark Valley would be 306,659 acres in size, making it smaller than the Horse Heaven Hills, which is 570,000 acres. Of this, 219,838 acres, or 72 percent, would be in Idaho, while the remaining 86,820 acres would be in Washington.

The Lewis-Clark Valley is defined in elevation by being below 2,000 meters, and 95 percent of the soil in the proposed AVA is one classification, mollisol. That the soil type is so uniform is unusual, especially for such a large area, according to Busacca.

Three main rivers – the Snake, Clearwater and Grande Ronde – flow through the Lewis-Clark Valley.

Nearly 100 acres of grapes are being grown in the Lewis-Clark Valley, with the majority on the Idaho side. In all, 23 European wine grape (vinifera) varieties are grown in the Lewis-Clark Valley, and no such grapes are grown immediately adjacent to the proposed AVA.

This is a warm area, with an average of 2,825 growing degree days per year. Growing degree days, or GDDs, are a way of measuring just how much heat a region gets. By comparison, Red Mountain in Washington receives an average of 3,119 GDDs, making it the warmest area in Washington. At the Lewiston airport, the GDD number jumps to 3,036, slightly cooler than the Horse Heaven Hills.

“This is a region that has all the potential in the world,” Umiker told Great Northwest Wine.

The Lewis-Clark Valley receives a mean annual rainfall of 17 inches, ranging from 9 inches near Asotin, Wash., to 25 inches near Orofino, Idaho. It is in the rain shadow of the Blue Mountains, and there are no significant vineyard plantings within 100 miles of the Lewis-Clark Valley. The watershed, geology, geography and climate are all influenced by the Bitterroot Mountains, which are part of the northern Rocky Mountains.

The valley and its two main cities get their names from Meriwether Lewis and William Clark, who led the Corps of Discovery from St. Louis to the Pacific Ocean. They famously came through the valley in October 1805 after crossing through the Bitterroot Mountains.

This would be Washington’s fourth bi-state AVA, with the other three being the Columbia and Walla Walla valleys and the Columbia Gorge, all of which are shared with Oregon. Overall, it would be Washington’s 14 AVA. The Lewis-Clark Valley would be Idaho’s second bi-state AVA, as the Snake River Valley is shared with Oregon.

Columbia Valley would lose acreage

The Lewis-Clark Valley AVA would resect part of the Columbia Valley AVA.

The proposed boundaries of the Lewis-Clark Valley AVA would include resecting part of the Columbia Valley AVA.

Perhaps the only controversial part of the Lewis-Clark Valley AVA proposal is the removal of 57,019 acres from the Columbia Valley, which is 11,370,320 acres in size and stretches from Lake Chelan to the Idaho border.

The Columbia Valley petition, which was approved as an AVA in 1984, was researched and written by Clore and Wade Wolfe, both of whom worked for Ste. Michelle Wine Estates at the time.

Wolfe, who now owns Thurston Wolfe Winery in Prosser with his wife, Becky Yeaman, said he is not concerned with the Columbia Valley being reduced in size by less than 1 percent.

“I’m always open to something that makes more sense,” Wolfe said.

He said that when he and Clore were researching the proposed Columbia Valley AVA in the late 1970s and early 1980s, they never considered crossing into Idaho and instead made the Snake River the eastern boundary.

“I don’t remember a specific discussion with Walt or the TTB (the federal agency that regulates the wine industry) on that boundary. When we did the Columbia Valley, (the federal government) seemed to emphasize river drainages as the logical basis for drawing boundaries,” he said. “That was the criteria. As we’ve gotten into smaller AVAs, there’s different criteria for those boundaries. They seem to be using elevation and the relationship to geology and soils that are formed within an area.”

Wolfe said he was among those suggesting the Columbia Valley be reduced in size so that the Lewis-Clark Valley would not partly overlap with the Columbia Valley.

“Ultimately, I’m a pragmatist,” he said. “I think it’s totally reasonable to make those kinds of modifications.”

Rick Wasem, owner and winemaker of Basalt Cellars in Clarkston, has concerns.

“I support the Lewis-Clark Valley AVA,” he said. “But I don’t support taking Clarkston out of the Columbia Valley. The Columbia Valley is well known. I planted my vineyard in 1996 and started my winery in 2004 in the Columbia Valley. I hate to be removed from that.”

Wasem, who was among the first wineries to help form the Lewis-Clark Valley Alliance, instead would propose extending the Columbia Valley east into Idaho so that the entire Lewis-Clark Valley is within its borders, just as the Walla Walla Valley is in Oregon.

Wasem, who owns the only winery on the Washington side of the Lewis-Clark Valley, has 3.5 acres of grapes. Two other vineyards, Arnett in Clarkston and Rock ‘n’ J south of Asotin are the other two Washington plantings in the Lewis-Clark Valley.

Rock ‘n’ J, which overlooks the Grande Ronde River, is not in the Columbia Valley. All of the grapes for the 4.5 acre vineyard are sold to Clearwater Canyon Cellars.

Jim and Dana Arnett, owners of Arnett Vineyard, wrote a letter of support for the Lewis-Clark Valley petition, including being removed from the Columbia Valley.

About Andy Perdue

Andy Perdue is founding partner of Great Northwest Wine LLC and a longtime wine columnist. He is a third-generation journalist who has worked at newspapers since the mid-1980s and has been writing about wine since 1998. He co-founded Wine Press Northwest magazine with Eric Degerman and served as its editor-in-chief for 15 years. He is the author of "The Northwest Wine Guide: A Buyer's Handbook" (Sasquatch, 2003) and has contributed to four other books.


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  5. […] there also are problems with Idaho’s other pending AVA petition because the proposed Lewis-Clark Valley AVA involves two states — Washington and Idaho — while removing about 57,000 acres from the […]

  6. […] Patti Skinkis of Oregon State University. Also on the agenda is Jones’ presentation; an update on the proposed Lewis-Clark Valley AVA; research on soils of the Sunnyslope Wine District by consultant Alan Busacca, a vineyard owner in […]

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