P24-00217 Schlatter Family Estate Micro-Winery

The Schlatter Family Estate Micro-Winery project, located at 1111 Conn Valley Road in St. Helena, California, involves the establishment of a new winery with an annual production capacity of 5,000 gallons. The facility will be housed in a 4,998 square-foot Type III cave, featuring 3,798 square feet of production area and 1,200 square feet for hospitality and accessory use. Operational parameters include a maximum of 18 visitors per day for tours and tastings between 10am and 5pm, staffing by two full-time employees, and a strict prohibition on marketing events. The project includes the construction of a covered crushpad, a fire water storage tank, a new hydrant, and a parking area consisting of one ADA stall and two standard stalls. The project has been approved by the Napa County Zoning Administrator under Use Permit P24-00217-UP, following a Mitigated Negative Declaration under CEQA. Key infrastructure improvements include driveway upgrades to ensure emergency vehicle access, which requires an exception to Napa County Road and Street Standards and the removal of two live oak trees. Environmental compliance is managed through a Mitigation Monitoring and Reporting Program focusing on the protection of nesting birds, raptors, and special-status bats. Additionally, the project implements a comprehensive water availability plan, a preliminary stormwater control plan adhering to BASMAA standards, and a specialized wastewater system utilizing a Biofiltro treatment process for process water and a separate domestic septic system with subsurface drip irrigation.