MARQUETTE — The Honorable James L. Oberstar and the Robert S. Pierson were at the Lake Superior & Ishpeming ore dock in Marquette’s Upper Harbor this morning. The James L. Kuber is expected at 2 a.m. Wednesday, followed by the Michipicoten at 8 a.m. Wednesday. The Joseph L. Block is due at 1 p.m. Thursday, and the Michipicoten is due at 9 p.m. Thursday.