230 Long Ranch Road LLC Vineyard Development Agricultural Erosion Control Plan #P24-00114-ECPA

The project involves the development of a 14.8 gross acre vineyard on a 48.42-acre property located at 230 Long Ranch Road in St. Helena, California, with approximately 12.1 net planted acres distributed across four blocks. The work encompasses land disturbing activities on slopes exceeding 5%, including vegetation clearing, earthmoving, and land contouring, all governed by Agricultural Erosion Control Plan #P24-00114-ECPA, approved by Napa County’s Planning, Building and Environmental Services on June 8, 2026. The contractor must implement comprehensive erosion and sediment control measures, including cross-slope diversions, water bars, storm drain piping, straw mulch, erosion blankets, and cover crops to achieve at least 75–80% ground cover and meet soil loss thresholds for local soils such as Sobrante loam. All controls must remain functional through the rainy season and comply with USDA TR-55 hydrologic modeling and regional stormwater management guidance. Environmental compliance is central to the project, requiring adherence to Napa County Code Chapter 18.108 and directives from the Regional Water Board and California Department of Fish and Wildlife. Pre-construction surveys for sensitive plant species—including Clara Hunt’s milk-vetch, holly-leaved ceanothus, and Sharsmith’s western flax—must be conducted by qualified biologists during appropriate seasons, and any disturbance of these species triggers mandatory mitigation at a 3:1 replacement ratio. A 14.1-acre habitat area must be permanently preserved with recorded deed restrictions, and incidental take permits under the California Endangered Species Act may be required. The project must avoid impacts to federally listed species through consultation with the U.S. Fish and Wildlife Service, and all habitat restoration efforts must be monitored for three years with an 80% survival rate for transplanted vegetation. Exclusion fencing is limited to the project perimeter, and a 100-foot buffer must be maintained from all water resources. All submissions must be electronically filed via the PBES Cloud and CEQA Submit Portal in PDF format, with hard copies not accepted unless requested post-submission. The applicant, 230 Long Ranch Road LLC, is responsible for plan implementation and compliance, while Napa County PBES retains authority for inspections, enforcement, and final acceptance, with oversight conducted on-site at the project location.