Duckhorn Vineyards Winery Use Permit Major Modification #P19-00097-MOD and Variance Request #P19-00098-VAR

2 Documents in Project


SCH Number
Lead Agency
Napa County
Document Title
Duckhorn Vineyards Winery Use Permit Major Modification #P19-00097-MOD and Variance Request #P19-00098-VAR
Document Type
MND - Mitigated Negative Declaration
Present Land Use
General Plan: Agricultural Resource (AR) and Agriculture, Watershed, and Open Space (AWOS). Zoning: Agricultural Preserve (AP). Present land uses are winery facilities, vineyards, rural residence.
Document Description
Approval of a Use Permit Major Modification to an existing 160,000 gallon per year winery to allow the following: 1) construction of a 58,042 square foot facility (‘West Winery’) on the West Property (APN 022-100-033) containing 54,722 sq. ft. of production space and 3,320 sq. ft. of office and accessory uses, a 90,000 gallon fire protection water tank, two 158,000 gallon irrigation storage water tanks, a 24,000 gallon domestic water tank, landscaping, driveways, and other winery improvements; 2) construction of a 8,839 square foot expansion to the existing Estate House on the East Property (APN 022-130-010) for a total floor space of 18,162 sq. ft.. At build out the Estate House will consist of 17,810 sq. ft. of accessory space and 352 sq. ft. of production space; 3) removal of the existing combined process and sanitary wastewater system on the East Property and the development of separate process and sanitary wastewater systems on both the East and West Properties connected through Directional Boring under the Napa River; 4) increase onsite parking spaces from 68 to 96; 5) demolition of the existing Tank Shed, Chais 1, 2, 3 & 4 on the East Property; 6) demolition of a single family residence (Red House), portions of the existing gravel driveway and other agricultural and single-family dwelling improvements on the West Property and APN 022-100-034; 7) conversion and expansion of a 16,900 sq. ft. agricultural pond on the West Property to a 20,300 sq. ft. bio-retention pond; 8) removal of approximately 3.55 acres of vineyard on the West Property; 9) removal of approximately 49 trees; 10) increase in maximum annual permitted wine production from 160,000 gallons to 300,000 gallons; 11) increase the existing daily “By Appointment” Tours and Tastings of 82 visitors and voluntarily abandon the winery’s existing pre-Winery Definition Ordinance (WDO) entitlement of 50 visitors per week (no more than 30 on the busiest day) for “Public Tours and Tastings” for a total of 219 daily visitors for By Appointment Tours and Tastings (110 visitors per day for Tours and Tastings without food, 109 per day for Tours and Tastings with food); 12) Modification of the existing Marketing Plan allowing Private Tours and Tastings events for up to 20 guests 120 times annually, Wine with Food Pairings events for up to 25 guests 36 times annually, Large events for up to 600 guests twice annually, and Auction-related events for up to 250 guests twice annually as follows: 200 Private Tours and Tastings annually for up to 20 guests, 40 Wine with Food Pairings annually for up to 25 guests, 40 Medium Events annually for up to 60 guests, three (3) Large Events annually for up to 400 guests and one (1) Auction-related event for up to 250 guests; 13) addition of activities in conformity with AB 2004 (Evans Bill) on the Estate House porch and landscaped gardens west of the Estate House; and 14) Temporary relocation of approved hospitality activities (Tours and Tastings, Marketing Events, AB 2004) in and around the Estate House to the 2,067 sq. ft. of ground floor accessory space and adjacent outdoor areas of the proposed West Winery during the expansion of the Estate House. Hospitality activities to return to the Estate House and East Property upon approval of final occupancy of the Estate House. A Variance application (P19-00098) is also requested to allow the expansion of the existing Estate House approximately 100 feet from the center line of Silverado Trail. Napa County Code requires a 600-foot winery setback from Silverado Trail (N.C.C. § 18.104.230.A.1) An Exception to the Napa County Road and Street Standards is also requested from a Left Turn Lane Warrant for east bound traffic on Lodi Lane entering the East Property driveway in order to avoid significant environmental impacts by preserving unique features of the natural environment.

Contact Information

Trevor Hawkes
Agency Name
County of Napa
Job Title
Supervising Planner
Contact Types
Lead/Public Agency


St. Helena
Northern California, Unincorporated
Cross Streets
Lodi Lane & Silverado Trail
Total Acres
Parcel #
022-130-010, 022-100-033, 022-100-034 & 022-100-035
State Highways
Culinary Institute of America at Greystone
Napa River

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Transportation, District 4 (DOT), California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), California State Lands Commission (SLC), Department of Toxic Substances Control, Office of Historic Preservation, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Divison of Financial Assistance, California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
State Reviewing Agency Comments
California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
Development Types
Other (Winery)
Local Actions
Use Permit
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Septic System, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire
Local Review Period Start
Local Review Period End


Draft Environmental Document [Draft IS, NOI_NOA_Public notices, OPR Summary Form, Appx,]
Notice of Completion [NOC] Transmittal form
State Comment Letters [Comments from state reviewing agencies]

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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