Though the crew might have been able to restore power to the vessel by firing up the generators in the ship's other engine room, Cuty said the ship's engineers made the right call in not doing so.

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Canada brought in the big guns -- a Navy ship and Army helicopter with engineers and supplies.

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They then began to ship heavier, and, as the engineers had warned them, the tracks indeed broke down.

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The Army Corps of Engineers was engaged to build the Chicago Sanitary and Ship Canal, in what was then the largest earth moving effort in North American history.

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So far, Nord Stream engineers say the majority of objects that they have found were boulders, ship-wrecks and even a few shopping trolleys and washing machines.

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In 2002 the Army Corps of Engineers (ACE) installed a series of electric barriers 37 miles downriver in the Chicago Sanitary and Ship Canal, an artificial channel that links the lakes with the Mississippi and its tributaries.

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