Berryessa is a reservoir located in Napa County, California, with a capacity of 1.6 million acre-feet. The history of the reservoir dates back to the 1950s when it was constructed as part of the Solano Project. The primary purpose of the reservoir is to provide water for irrigation and municipal use. The water is supplied from the Cache Creek and Putah Creek watersheds, which are the primary surface flow and snowpack providers, respectively. The reservoir also supports recreational activities such as boating, fishing, and camping. Additionally, the surrounding area is home to agricultural activities, including cattle grazing and vineyards. Berryessa serves as a vital water source for the region, and its management is critical to ensure the sustainability of the water supply.