KJS and Sorrento Vineyard Conversion Erosion Control Plan Application (ECPA) #P17-00432

KJS and Sorrento Vineyard Conversion Erosion Control Plan Application (ECPA) #P17-00432

The Hyperion Vineyard Holdings LLC (a.k.a. KJS Investment Properties LLC and Sorrento Inc.) Vineyard Conversion Erosion Control Plan Application Project (#P17-00432-ECPA) (proposed project) proposes vegetation removal and earthmoving activities on slopes greater than five percent in connection with the development of 111.5 net acres of vineyard within 156.8 gross acres on a 972.8-acre project site. Proposed activities associated with vineyard development include removing vegetation within the proposed clearing limits, ripping, rock removal, soil cultivation, seeding a cover crop, mulching, trenching for irrigation pipelines, installing a trellis system and deer fence, laying out vine rows, and installing temporary and permanent erosion control measures. The proposed project also includes Petitions for Change on Water Right License 9125 (Application 13943) and Permit 18459 (Application 26165), which are pending review and processing with the State Water Resources Control Board, Division of Water Rights. The petitions request an expansion of the place of use to 280 acres (which includes the existing vineyards on the project site as well as the proposed vineyards); the construction of a new 48- acre-foot capacity offstream reservoir; and the construction of a new diversion structure in Elder Creek that would divert water to offstream storage in the new offstream reservoir and to the existing offstream PITA Pond as a point of rediversion. The Petition for Change also identifies Matheson Dam as a point of diversion to offstream storage at the proposed offstream reservoir. The project also includes the ongoing maintenance of erosion control measures and operations of approximately 4.3 acres of existing vineyard that were converted from grassland/hay pasture in 2015 without an approved ECPA. These vineyard areas are located within two larger vineyard blocks totaling 17.4 acres, all of which occur on lands with a slope of 5 percent or less and therefore, are not subject to an ECPA pursuant to Napa County Code (NCC) Section 18.108.070(B) except for the aforementioned 4.3 acres occurring on slopes over 5 percent. Accordingly, the vineyard development area requiring ECPA coverage pursuant to NCC Section 18.108.070(B) will be included in this project.

St. Helena

Napa

Countywide

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 Pesticide Regulation (DPR), California Department of Water Resources (DWR), California Governor's Office of Emergency Services (OES), 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), Department of Toxic Substances Control, Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Rights, California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Transportation, District 4 (DOT)

California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Transportation, District 4 (DOT)

Other (Vineyard - 156.8 gross acres)

Erosion Control Plan Application

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Septic System, Sewer Capacity, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire