The steam tug E.P. DORR collided with the Canadian propeller OLIVER CROMWELL on Lake Huron in June 1856. The tug sank in deep water within three minutes of the collision and was a total loss. The property loss, including the hull, was $38,000 for both vessels. The E.P. DORR was a new and powerful tug of about 500 tons, built in the same year by Van Slyke, Notter & Co. in Buffalo for the Chicago Mutual, Garden City of Chicago, and Star of Ogdensburgh Insurance Companies. The combined loss for these insurance companies was approximately $10,000. The tug was on its way to Chicago from Detroit at the time of the accident and was carrying one of the Buffalo Mutual’s large steam pumps on board.