TO: NAPA COUNTY ZONING ADMINISTRATOR
FROM: Joseph Dotta for Brian D. Bordona - Planning, Building, Environmental Services Director
REPORT BY: Joseph Dotta, Planner I
SUBJECT: Harvest STOMP 2026 at Opus One Winery
RECOMMENDATION
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Harvest STOMP 2026 at Opus One Winery Temporary Event Category 4 Application #P26-00169
CEQA Status: Ministerially Exempt from the provisions of the California Environmental Quality Act (CEQA). The project site is not included in the list of hazardous materials sites pursuant to Government Code Section 65962.5.
Request: Approval of an application for Temporary Event License filed by Arwen Gallenkamp on behalf of the Napa Valley Grapegrowers to hold Harvest STOMP 2026 at Opus One Winery. This new Category 4 event is an annual fundraising gala to raise funds for Napa Valley Grapegrowers and Napa Valley Farmworkers Foundation. Festivities will include a reception with food and wine, auction and live band performance. The event will be for a maximum of 550 attendees from 6:00 pm to 11:00 p.m. on Saturday, August 22, 2026. This event is proposed to be held on one parcel located at 7900 St Helena Hwy, Napa, CA, Assessor's Parcel # 031-020-007-000. The parcel located at 7848 St Helena Hwy, Napa, CA, Assessor's Parcel # 031-020-009-000, will not feature event activities and its driveway will be used for site access.
Staff Recommendation: Find that the project is Ministerially Exempt from CEQA and approve the Temporary Event Application.
Staff Contact: Joseph Dotta, Planner I, (707) 299-1361 or Joseph.dotta@countyofnapa.org.
Applicant Contact: Caleb Mosley, Executive Director, Napa Valley Grapegrowers, cmosley@napagrowers.org. Arwen Gallenkamp, Event Productions, arwen.gallenkamp@gmail.com.
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EXECUTIVE SUMMARY
That the Zoning Administrator:
1. Find that the project is Ministerially Exempt from the CEQA; and
2. Approve the Temporary Event Category 4 License P26-00169.
Discussion: On June 22, 2026, Arwen Gallenkamp, on behalf ...
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