Ontrail Vineyards Micro-Winery Use Permit, P25-00139-UP
2 Documents in Project
Summary
SCH Number
2026080629
Lead Agency
Napa County
Document Title
Ontrail Vineyards Micro-Winery Use Permit, P25-00139-UP
Document Type
NOD - Notice of Determination
Received
Posted
10/27/2026
Document Description
Proposal for a phased Micro-Winery Use Permit for a new 5,000 gallon per year winery with daily tours and tastings by appointment on a 13.33 acre parcel.
Phase 1 consists of the following:
• Convert the existing 1,951 sq. ft. barn to production space for barrel fermentation and aging of up to 5,000 gallons of wine per year, with all crush activities occurring at an offsite facility, and utilizing an on-site self-contained mobile bottling services, which will be located south of the existing barn.
• Convert the existing 529 sq. ft. farm labor office to winery tasting and accessory uses.
• By appointment visitation, tours and tasting, and retail wine sales for up to 10 visitors per day, or 70 visitors per week.
• On-premises consumption of wine (Business and Professions Code Section 23358, 23390, and 23396.5) in a 2,500 sq. ft. area located on the outdoor patio of the tasting room.
• Hours of operation include seven days a week from 8 a.m. to 5 p.m., except during harvest for production, and seven days a week from 9 a.m. to 6 p.m. for visitation.
• One (1) full-time and one (1) part-time employee (one employee is an owner-operator who lives onsite).
• Installation of four (4) parking spaces [one (1) accessible, two (2) standard, and one (1) compact.
• Use of an existing domestic wastewater treatment system to serve the tasting room and winery. No winery process wastewater would be generated during Phase 1 winery facility; cleaning of equipment will occur offsite.
• Use of an existing groundwater well (Well #1).
Phase 2 consists of the following:
• Convert the 1,951 sq. ft. barn to a non-winery use.
• Construct either a new 4,103 sq. ft. winery building or a 2,152 sq. ft winery building (provided the 1,951 sq. ft. barn continues use as a winery building).
• Installation of five each 5,000-gallon water storage tanks.
• Removal of 0.13 acres of existing vineyards to accommodate the new 4,103 sq. ft. winery production building.
• Construction of a fire truck turnaround in between the farm labor office and proposed new winery building.
Phase 3 consists of the following:
• Construction of a 730 sq. ft. covered crush pad.
• On-site production and the installation of either a production wastewater system to accommodate on-site treatment or utilization of a hold and haul wastewater system.
Phases 2 and 3 may occur any time after completion of the Phase 1 improvements.
Contact Information
Name
Jim Fassio
Agency Name
Applicant
Job Title
Owner
Contact Types
Project Applicant
Phone
Email
Name
Wendy Atkins
Agency Name
County of Napa
Job Title
Planner II
Contact Types
Lead/Public Agency
Phone
Location
Coordinates
Cities
Napa, Unincorporated Area
Counties
Napa
Regions
Northern California, Unincorporated
Cross Streets
Silverado Trail and Soda Canyon Road
Zip
94558
Total Acres
13.33
Jobs
2
Parcel #
039-610-003
State Highways
Silverado Trail
Railways
NVRR
Airports
0
Schools
Sunrise Montessori of Napa Valley, Willow, Vichy, Vintage
Waterways
Dry Creek, Miliken Creek, Napa River, Sarco Creek, Soda Creek
Township
4W
Range
22
Section
6N
Base
MDM
Other Location Info
3252 Silverado Trail
Notice of Determination
Approving Agency
Napa County Planning Commission
Approving Agency Role
Lead Agency
Approved On
County Clerk
Napa
Final Environmental Document Available at
https://www.napacounty.gov/2876/Current-Projects-Explorer
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
Attachments
Notice of Determination
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