The National Transportation Safety Board has announced its inspection team investigating the oil pipeline rupture in Calhoun county have returned to Washington D.C.
While the move does not mean the investigation is over, it does indicate that investigators at this point have accomplished everything it needed to while in Michigan.
A report with final findings is not expected to be released for another 18 months.
The investigators left the state before the ruptured line could be excavated and removed from the spill site. Officials from the Environmental Protection Agency and Enbridge Energy, which owns the pipeline, say the ruptured line, while uncovered, has been difficult to remove. They say the pipe is located in a very “swampy” area, and the hole being dug to remove 140 feet of pipe line continues to fill up with water. Before EPA and Enbridge can move forward on pipe removal, they will have to develop a plan to remove the water and oil from the hole before removing the line.