Maacama Watershed Alliance v. County of Sonoma
Annotate this CaseThe 86-acre Knights Valley parcel in rural Sonoma County is zoned “Land Extensive Agriculture,” which allows wineries and tasting rooms as conditional uses. The project is a two-story, 5,500-square-foot winery building with a 17,500-square-foot wine cave, wastewater treatment, water storage facilities, fire protection facilities, and mechanical areas, covering approximately 2.4 acres. The site contains two residences and 46 acres of vineyards. The nearby area is primarily vineyards. County staff reviewed reports considering impacts on geology, groundwater, wastewater, and biological resources, and concluded that, with recommended mitigation, the project would not have a significant effect on the environment. The county approved the use permit with conditions and adopted a mitigated negative declaration under the California Environmental Quality Act (Pub. Resources Code 21000) and a mitigation monitoring program. The court of appeal upheld the approval. Opponents did not provide evidence that the project is reasonably likely to cause landslides or otherwise generate environmentally harmful releases of debris; that erosion from the project, particularly runoff from the cave spoils, will cause significant effects on Bidwell Creek and degrade the habitat for salmonids; or that the project’s groundwater use will significantly affect salmonids, groundwater supply in neighboring wells, and fire suppression. There was no substantial evidence that the winery will have a significant aesthetic impact or that there is a reasonable possibility the project, as conditioned, will significantly increase the risk of wildfires.
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