(NVC) - Napa County Supervisors are wading again into the community discussion about whether wine country is drowning in its own success or has a success story worth toasting.

On Tuesday, they will explore whether the county needs a major transformation in winery growth policy, changes on the margins or no changes. They will tackle issues that have simmered for a couple of years.

And there’s a new backdrop.

Planners had previously reported that winery growth is on target with the county’s master growth plan. They now say growth is outstripping the forecast. The general plan’s projected growth rate called for about 60 new wineries to be approved over the past decade, 86 have been approved and 29 applications are pending.

At this rate, the 150 new wineries that the general plan foresaw being added between 2005 and 2030 will be approved by mid-2023, a county report said. Napa County has about 450 wineries.

“With the rapid growth of the wine industry, there has been increasing concern raised regarding the rate, intensity and location of development within the unincorporated areas,” the report said.

Meanwhile, some people say some wineries are becoming glitzy event centers inappropriate for an agricultural area. Others say wineries are doing what they must to survive in today’s market and are causing few problems.

Board of Supervisors Chairwoman Diane Dillon on Friday was uncertain how much supervisors will be able to accomplish in one day as they look at revising the 1990 Winery Definition Ordinance and code enforcement policies.

“I think a lot depends on how much public comment there is, which is the public’s right … I have no idea if we’re going to have two hours of testimony or six,” she said.

Supervisors have a long list of recommendations to consider. The ideas originated with the board-appointed Agricultural Protection Advisory Committee (APAC), which had representatives from the wine and farming industries, the cities, environmentalists, businesses and neighborhood groups.

In addition, the Planning Commission made a few modifications to the recommendations. Altogether, the package going to the Board of Supervisors is eight months in the making.

One recommendation calls for having all wineries attest annually they are following their use permits, as well as submit supporting data. Violators would have to immediately come into compliance and wait at least a year before applying for use permit changes.

Another would limit how much of a rural property could be paved over for a winery, home and other structures. Another would create a fast-track for proposed small wineries that meet certain criteria. Another would in most instances require new wineries to deal with their wastewater onsite.

Napa Valley Vintners and Napa Valley Grapegrowers support the APAC recommendations. The two groups each had a voting member on the committee.

But there’s a complication. APAC stipulated that revised winery growth regulations should apply only to new wineries, not to permit changes for expansions and major modifications at existing wineries.

County staff has since said that the county might be legally bound to apply the new rules to expansions and major modifications at existing wineries. The existing wineries themselves would remain legal and conforming uses.