Le Colline is far from the last word on vineyard development in local mountains, with a bigger KJS & Sorrento project recently receiving tentative approval from Napa County. The proposed 28-acre Le Colline project near Angwin, which was approved administratively in the same manner, became a flashpoint. The county Board of Supervisors tentatively overturned that approval on Aug. 15 after opponents filed an appeal and is to take a final vote on Nov. 7.  Napa County Farm Bureau has questioned whether the county is following its own agricultural-promoting policies. Environmentalists who opposed Le Colline applauded the Board of Supervisors’ decision and pointed to county conservation regulations.