ARTHUR – Jack Benham seemingly knew the former Preston Street dump would become something more.He told Wellington County waste services manager Das Soligo as much eight years ago over lunch.Closed many decades ago, the county took over the closed Arthur landfill site at the turn of the century.“It was basically a large lawn with some spruce trees,” Soligo recalled.“He told me: ‘This site’s going to be a park one day.’”Soligo admits to pooh-poohi…