Arrow and Branch Winery, Use Permit Major Modification #P23-00057-MOD

The Arrow and Branch Winery Use Permit Major Modification (P23-00057-MOD) was approved by the Napa County Board of Supervisors on April 28, 2026. Located on a 10.09-acre site in Napa, California, the project authorizes an increase in annual wine production from 30,000 to 45,000 gallons. The scope of work includes expanding the winery building to create a total of 13,797 square feet of production space and 4,308 square feet of accessory space. Additional site improvements involve the construction of a balcony, a covered terrace for outdoor tasting, the installation of an 81,000-gallon process water storage tank, and the reconfiguration of existing parking to include twelve spaces, one of which is designated for ADA access. Operationally, the modification allows for increased employment, more marketing events, and an increase in daily tours and tastings by appointment only. The project has undergone extensive environmental and technical review, resulting in a Mitigated Negative Declaration under CEQA. Key assessments include a Tier 3 Water Availability Analysis confirming that groundwater pumping will not impact the nearby Dry Creek, and a biological assessment concluding that no suitable habitat for the Northern Spotted Owl exists on-site. The project must adhere to strict lighting requirements to minimize impact on adjacent properties and comply with Napa County General Plan noise standards. Infrastructure requirements include the classification of the onsite water system as a transient noncommunity public water system and the implementation of a Mitigation Monitoring and Reporting program to protect biological and noise resources. Projected annual operational and maintenance expenses for the water system are estimated to range from approximately 22,024 dollars in 2023 to 23,483 dollars by 2027.