Lyons Vineyard Conversion #P19-00496-ECPA


SCH Number
Lead Agency
Napa County
Document Title
Lyons Vineyard Conversion #P19-00496-ECPA
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Agricultural (vineyard), residential, and undeveloped land

Document Description
The project includes clearing of vegetation (oak woodland, toyon chaparral and non-native grassland), earthmoving, and installation and maintenance of erosion control measures associated with the development of approximately 19.0 gross acres (15.9 net acres) of new vineyard within five development areas (A-E), including the temporary disturbance of 0.5 acres of grassland for a temporary equipment staging and materials storage area for a total project area of 19.5 acres, located on an approximate 79.3 acre parcel (Figures 1 - 3). Additionally, approximately 3.8 acres of vineyard within Phases 3 and 4 approved by 97061-ECPA (referred to in # P19-00496-ECPA as Development Areas F and G) that has not been converted to vineyard would be developed in conjunction with the proposed project. Combining the development areas in Phase 3 and 4 of #97061-ECPA with the proposed development areas in the proposed project yields a total development area of approximately 23.3 acres. The #P19-00496-ECPA configures the above-referenced development areas as described in Table 1, Proposed New Vineyard Development Summary.

Contact Information
Donald Barrella
Napa County
Lead/Public Agency
1195 Third Street, Suite 210
Napa, CA 94559

Phone : (707) 299-1338


38°39'17.05"N 122°10'32.63"W
Cross Streets
Coombsville Road
Total Acres
Parcel #
State Highways
Wooden Valley Creek, Susiun Creek
6 N
3 W
Other Location Info
8280 Wild Horse Valley Road

Notice of Completion

Review Period Start
Review Period End
Development Type
Other (Agricultural (vineyard) development )
Local Action
Agricultural Erosion Control Plan
Project Issues
Agriculture and Forestry Resources Biological Resources Drainage/Absorption Geology/Soils Hydrology/Water Quality Land Use/Planning Vegetation
Reviewing Agencies
California Air Resources Board (ARB) California Department of Conservation (DOC) California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW) 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 Native American Heritage Commission (NAHC) California Natural Resources Agency California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB) Department of Food and Agriculture Office of Historic Preservation State Water Resources Control Board, Division of Drinking Water


Draft Environmental Document [Draft IS, NOI_NOA_Public notices, OPR Summary Form, Appx,]
Initial Study_Lyons P19-00496_March 16 2021   PDF 1192 K ISMND Exhibit A - Erosion Control Plan   PDF 5593 K ISMND Exhibit B - Biological Resources Redonnaissance Survey-Report   PDF 4434 K ISMND Exhibit C - Archaeological Evaluation   PDF 850 K ISMND Exhibit D - Water Availability Analysis   PDF 3338 K ISMND Exhibit E - Geotechnical Investigation   PDF 6308 K ISMND Exhibit F - USLE-Soil Loss Calculations   PDF 925 K ISMND Exhibit G - Hydrologic-Drainage Analysis   PDF 9055 K ISMND Exhibit H - Poject Revision Statement   PDF 1386 K ISMND Figure 1 - Site Location (USGS Map)   PDF 1289 K ISMND Figure 2 - Overall Site Location (2018 Aerial)   PDF 298 K ISMND Figure 3 - Project Area (ECPA boundaries)   PDF 479 K Notice of Intent_Lyons_P19-00496-ECPA   PDF 311 K Public Notice_Lyons ISMND_P19-00496-ECPA   PDF 1504 K Summary Form F_ Lyons P19-00496-ECPA   PDF 191 K
Notice of Completion [NOC] Transmittal form
ISMND Exhibit A-1 - Vegetation Retention Analysis   PDF 3231 K Notice of Completion_Lyons P19-00496-ECPA_Signed   PDF 416 K

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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