Napa Anon
Found this document regarding the CA rail line - it has many maps; potentially useful to you. Also found an article from 2006 re: Pelosi grape sales and 'right wing conspiracies". The article has additional names of growers.
http://www.nvta.ca.gov/sites/default/files/5.%20Napa%20Solano%20Pass%20Freight%20Rail%20Study.pdf (this document would not archive)
https://fermentationwineblog.com/2006/11/nancy_pelosi_ri/ (archived @ http://archive.fo/HRHpO)