InsideClimate: If all goes well, the next oil removal operation on Michigan's Kalamazoo River will mark the beginning of the end for the cleanup of the largest oil pipeline spill in U.S. history The spill, which occurred in July 2010, already has cost pipeline operator Enbridge Inc. more than $820 million in cleanup expenses. That figure could top $1 billion [3] by the time the latest operation is carried out. The goal of the new effort is to dredge three areas of the river where the U.S. Environmental Protection...