The Winery That Wouldn't Die: How Livermore Valley Survived Prohibition

Harvest is over. The tanks are quiet, the barrels are sealed, and Livermore Valley's cellars are settling into the long, patient rhythm of aging. It's a good moment to think about the fact that this scene — this ordinary, annual continuity of winemaking — was nearly erased a century ago. And that the valley survived not through luck, but through a combination of legal ingenuity, agricultural pragmatism, and the stubborn determination of a handful of families who refused to let their vineyards go fallow.

The Blow That Came in 1920

When the Eighteenth Amendment took effect on January 17, 1920, Livermore Valley was one of the most productive wine regions in California. The Wente, Concannon, and Cresta Blanca operations had been running for nearly four decades. The valley's gravelly soils and afternoon marine winds had already proven themselves capable of producing wines that won international recognition — Cresta Blanca's Sauvignon Blanc had taken the Grand Prize at the 1889 Paris Exposition. There were more than 50 wineries operating in the valley at Prohibition's onset.

By the time Repeal arrived in 1933, most of them were gone.

The Legal Loopholes That Kept the Vines Alive

Prohibition was not a total ban on wine. The Volstead Act, which implemented the Eighteenth Amendment, contained two provisions that kept California's wine industry from complete collapse — and that Livermore's surviving producers exploited with considerable skill.

The first was the sacramental wine exemption. Churches and synagogues were permitted to purchase wine for religious purposes, and the demand was substantial. The Concannon family — Irish Catholic immigrants with deep ties to the Catholic Church — were particularly well-positioned to supply this market. James Concannon had already established relationships with the Church through his earlier work as a rubber stamp salesman (he'd sold stamps to the Archbishop of San Francisco), and those connections proved invaluable when the winery needed a legitimate distribution channel for its output. Concannon Vineyard became one of the primary suppliers of sacramental wine in California during Prohibition, and the winery never stopped making wine through the entire thirteen-year period.

The second exemption was for home winemaking. The Volstead Act permitted heads of household to produce up to 200 gallons of "non-intoxicating cider and fruit juices" per year for personal consumption. The definition of "non-intoxicating" was never seriously enforced, and the provision effectively legalized home winemaking across the country. For Livermore's grape growers, this created a massive and entirely legal market: families across the country wanted wine grapes, and California's Central Valley and coastal regions were happy to ship them east by rail.

The Grape Shipping Boom — and Its Consequences

The home winemaking exemption transformed California viticulture in ways that would take decades to undo. Grape prices spiked dramatically as demand from home winemakers outpaced supply. Growers who had been producing wine grapes for quality-focused wineries suddenly found they could earn more by shipping fresh grapes to amateur winemakers in Chicago, New York, and Boston.

The catch was that shipping grapes required thick-skinned varieties that could survive a cross-country rail journey without rotting. Alicante Bouschet — a deeply pigmented, tough-skinned variety with almost no quality credentials — became the dominant planting across California during Prohibition, because it arrived intact and produced a deeply colored must that home winemakers found convincing. Delicate, thin-skinned varieties like Pinot Noir and the valley's prized Chardonnay and Sauvignon Blanc clones were pulled out and replaced.

Livermore's gravelly soils, which had been planted to Bordeaux varieties since the 1880s, were not immune to this pressure. Some growers converted to Alicante Bouschet and other shipping varieties. But the families who kept their eyes on the long game — the Wentes and Concannons, primarily — maintained enough of their original plantings to matter when Repeal finally came.

What Repeal Found

When Prohibition ended on December 5, 1933, the California wine industry was in a state of considerable disrepair. Most of the state's winemaking infrastructure had been dismantled, sold off, or converted to other uses. The workforce of skilled winemakers had dispersed. The market for quality wine had been replaced by a market for cheap, high-alcohol fortified wines that home winemakers had been producing for years.

Livermore Valley was better positioned than most regions, but not without its own scars. The valley's winery count had dropped from more than 50 to a handful. The vineyards that had survived were a patchwork of quality varieties and Prohibition-era shipping grapes. And the consumer market that had once supported premium Livermore wine had to be rebuilt from scratch.

The Wente family moved quickly. Ernest Wente, who had studied enology at UC Davis before Prohibition and had spent the intervening years maintaining the family's vineyards and sacramental wine operation, was ready to produce commercial wine almost immediately after Repeal. The family's decision to maintain their Chardonnay and Sauvignon Blanc plantings through Prohibition — rather than converting to Alicante Bouschet — gave them a head start on the quality market that would eventually define California wine.

The Longer Legacy

The families that survived Prohibition didn't just keep their wineries alive — they kept the genetic material of California's wine industry alive. The Wente clone of Chardonnay, which now accounts for an estimated 80% of California's Chardonnay vines, survived because the family maintained those plantings through thirteen years of federal prohibition. The Concannon Petite Sirah selections — some of the oldest Petite Sirah vines in California, still producing fruit today — survived because the winery had a legal reason to keep making wine.

That continuity is not a small thing. Vine genetics, once lost, are extraordinarily difficult to recover. The varieties that were pulled out during Prohibition and replaced with Alicante Bouschet are largely gone from California's landscape. What Livermore's surviving producers preserved was not just their own businesses — it was a piece of California's viticultural heritage that would have been very difficult to reconstruct.

The Cellars Today

The wines aging in Livermore's barrels right now — the 2026 vintage, just weeks out of fermentation — are the direct descendants of a winemaking tradition that survived Prohibition, two world wars, and the suburban development that consumed much of the valley's agricultural land in the postwar decades. The vines that produced some of this year's fruit are old enough to have been in the ground before Repeal.

That's not nostalgia. It's context. When you open a bottle of Livermore Cabernet Sauvignon or Petite Sirah, you're drinking from a tradition that was nearly extinguished a century ago — and that survived because a few families decided their vineyards were worth fighting for.

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Wine Livermore celebrates the producers, the people, and the place that make this valley one of California's most storied wine regions.