GUERNEVILLE, California — A decision on a controversial and long-delayed logging plan in the hills above the Russian River between Guerneville and Monte Rio could receive a thumbs-up or thumbs-down as early as Tuesday. A verdict on the Silver Estates timber harvest plan has been delayed 23 times since its first round of public review in 2020. …But even as parties on both sides await news of the proposal’s fate, a whole new possibility has cropped up that could have profound implications. West County Supervisor Lynda Hopkins has initiated conversations with landowner Roger Burch about the potential for a conservation purchase of the property. …The Clar Tree, a roughly 340-foot-tall redwood tree estimated to be 2,000 years old, is in that area. About 14 feet in diameter at its base, it may be the tallest tree on private property in the world, some say.