Watershed Protection in Action: ECP & Winterization Deadlines Approaching

Each year, growers follow standards mandated by Napa County's Conservation Regulations and Erosion Control Plans (ECP) that prevent erosion and promote water security, protecting public health and preserving natural resources.  The following is a reminder of the annual requirements for Napa County grape growers:

• No earthmoving activities from October 15 to April 1 on slopes greater than 5% (September 1 to April 1 for vineyards in municipal watersheds)
• Winterization for most vineyards including cover cropping and installation of straw waddles by October 15 (September 15 for vineyards in municipal watersheds)

 
The County conducts annual randomized inspections to ensure winterization practices are enforced.  Individual Erosion Control Plans may be subject to other deadlines and extensions based on individual ECPs.
 
Since the 2017 fires, Napa County has allowed property owners to delay the application of straw mulch beyond the winterization deadline by submitting a formal winterization extension request for review and approval.