Daniel Martin, a member of the vineyard crew at Keuka Lake Vineyards, died in an accident on Monday. The 51-year old was pinned underneath a tractor, which he had been operating on the hill of the property. “He will be greatly missed,” KLV owner Mel Goldman said in an email. “It is deeply shocking. I knew him quite well.” Martin had worked for KLV for the past ten years, and was familiar with the vagaries of the property. Keuka Lake Vineyards is perched on some of the steepest vineyard sites in the region; it’s the kind of terrain that is…