A walk to the end of the Ashland Oredock feels like a walk out onto Lake Superior for Ed Monroe. “We’re out amongst the buoys and the shipping lane,” he said. What’s left of the Oredock--a slender tongue of concrete--juts 1,800 feet out from the city of Ashland. Not long ago, the superstructure, a hulking mass of metal, would have risen 80 feet over his head. During the Oredock’s operation, and after it was out of use, kids used to play out here, fishing and even jumping off the top. But even