sentences:  Mount Diablo Silverado Council serves chartered organizations and BSA units in Contra Costa County, Lake County, Napa County, Solano County (except the cities of Dixon, Rio Vista, and Vacaville), and the cities of Albany and Berkeley in northern Alameda County.The Mount Diablo Silverado Council (#023) was formed in 1992 as the result of a merger between the former Silverado Area Council (#038) and the former Mount Diablo Council (#023).The Mount Diablo Silverado Council can trace its history back to the Berkeley Council which was organized in March 1916.